diff --git a/app/src/main/java/io/legado/app/App.kt b/app/src/main/java/io/legado/app/App.kt
index ec425f5f0..d5387b0eb 100644
--- a/app/src/main/java/io/legado/app/App.kt
+++ b/app/src/main/java/io/legado/app/App.kt
@@ -14,15 +14,11 @@ import io.legado.app.constant.AppConst.channelIdReadAloud
 import io.legado.app.constant.AppConst.channelIdWeb
 import io.legado.app.constant.PreferKey
 import io.legado.app.data.appDb
-import io.legado.app.help.BookHelp
-import io.legado.app.help.CrashHandler
-import io.legado.app.help.LifecycleHelp
-import io.legado.app.help.RuleBigDataHelp
+import io.legado.app.help.*
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.ThemeConfig.applyDayNight
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.help.http.cronet.CronetLoader
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.model.BookCover
 import io.legado.app.utils.defaultSharedPreferences
 import io.legado.app.utils.getPrefBoolean
diff --git a/app/src/main/java/io/legado/app/api/controller/BookController.kt b/app/src/main/java/io/legado/app/api/controller/BookController.kt
index fae581bdf..d9bd46ac9 100644
--- a/app/src/main/java/io/legado/app/api/controller/BookController.kt
+++ b/app/src/main/java/io/legado/app/api/controller/BookController.kt
@@ -7,11 +7,11 @@ import io.legado.app.data.appDb
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookProgress
 import io.legado.app.data.entities.BookSource
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
 import io.legado.app.help.CacheManager
 import io.legado.app.help.ContentProcessor
 import io.legado.app.help.glide.ImageLoader
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.model.BookCover
 import io.legado.app.model.ReadBook
 import io.legado.app.model.localBook.LocalBook
diff --git a/app/src/main/java/io/legado/app/help/storage/AppWebDav.kt b/app/src/main/java/io/legado/app/help/AppWebDav.kt
similarity index 96%
rename from app/src/main/java/io/legado/app/help/storage/AppWebDav.kt
rename to app/src/main/java/io/legado/app/help/AppWebDav.kt
index d8b38d316..aae5baace 100644
--- a/app/src/main/java/io/legado/app/help/storage/AppWebDav.kt
+++ b/app/src/main/java/io/legado/app/help/AppWebDav.kt
@@ -1,4 +1,4 @@
-package io.legado.app.help.storage
+package io.legado.app.help
 
 import android.content.Context
 import io.legado.app.R
@@ -10,6 +10,8 @@ import io.legado.app.data.entities.BookProgress
 import io.legado.app.exception.NoStackTraceException
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.coroutine.Coroutine
+import io.legado.app.help.storage.Backup
+import io.legado.app.help.storage.Restore
 import io.legado.app.lib.dialogs.selector
 import io.legado.app.lib.webdav.Authorization
 import io.legado.app.lib.webdav.WebDav
@@ -29,13 +31,14 @@ import java.util.*
  * webDav初始化会访问网络,不要放到主线程
  */
 object AppWebDav {
-    private const val defaultWebDavUrl = "https://dav.jianguoyun.com/dav/"
+    const val defaultWebDavUrl = "https://dav.jianguoyun.com/dav/"
     private val zipFilePath = "${appCtx.externalFiles.absolutePath}${File.separator}backup.zip"
     private val bookProgressUrl get() = "${rootWebDavUrl}bookProgress/"
     private val exportsWebDavUrl get() = "$rootWebDavUrl${EncoderUtils.escape("exports")}/"
     val syncBookProgress get() = appCtx.getPrefBoolean(PreferKey.syncBookProgress, true)
 
     var authorization: Authorization? = null
+        private set
 
     val isOk get() = authorization != null
 
@@ -132,7 +135,7 @@ object AppWebDav {
 
     suspend fun hasBackUp(): Boolean {
         authorization?.let {
-            val url = "${rootWebDavUrl}${backupFileName}"
+            val url = "$rootWebDavUrl$backupFileName"
             return WebDav(url, it).exists()
         }
         return false
@@ -166,7 +169,7 @@ object AppWebDav {
             }
             FileUtils.delete(zipFilePath)
             if (ZipUtils.zipFiles(paths, zipFilePath)) {
-                val putUrl = "${rootWebDavUrl}${backupFileName}"
+                val putUrl = "$rootWebDavUrl$backupFileName"
                 WebDav(putUrl, it).upload(zipFilePath)
             }
         }
diff --git a/app/src/main/java/io/legado/app/help/storage/Backup.kt b/app/src/main/java/io/legado/app/help/storage/Backup.kt
index 4335c4beb..702d28ecc 100644
--- a/app/src/main/java/io/legado/app/help/storage/Backup.kt
+++ b/app/src/main/java/io/legado/app/help/storage/Backup.kt
@@ -6,6 +6,7 @@ import androidx.documentfile.provider.DocumentFile
 import io.legado.app.constant.AppLog
 import io.legado.app.constant.PreferKey
 import io.legado.app.data.appDb
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.config.LocalConfig
 import io.legado.app.help.config.ReadBookConfig
 import io.legado.app.help.config.ThemeConfig
diff --git a/app/src/main/java/io/legado/app/model/ReadBook.kt b/app/src/main/java/io/legado/app/model/ReadBook.kt
index 713a21712..614d71fc5 100644
--- a/app/src/main/java/io/legado/app/model/ReadBook.kt
+++ b/app/src/main/java/io/legado/app/model/ReadBook.kt
@@ -4,17 +4,16 @@ import io.legado.app.constant.AppLog
 import io.legado.app.constant.BookType
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.*
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
 import io.legado.app.help.ContentProcessor
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.ReadBookConfig
 import io.legado.app.help.coroutine.Coroutine
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.model.webBook.WebBook
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.ui.book.read.page.entities.TextChapter
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
-import io.legado.app.ui.book.read.page.provider.ImageProvider
 import io.legado.app.utils.msg
 import io.legado.app.utils.toastOnUi
 import kotlinx.coroutines.CoroutineScope
diff --git a/app/src/main/java/io/legado/app/ui/book/cache/CacheViewModel.kt b/app/src/main/java/io/legado/app/ui/book/cache/CacheViewModel.kt
index 1e29d7662..41be4c7e3 100644
--- a/app/src/main/java/io/legado/app/ui/book/cache/CacheViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/cache/CacheViewModel.kt
@@ -18,10 +18,10 @@ import io.legado.app.data.appDb
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.exception.NoStackTraceException
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
 import io.legado.app.help.ContentProcessor
 import io.legado.app.help.config.AppConfig
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.utils.*
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.ensureActive
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 8308029da..c507cb2cf 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -24,12 +24,12 @@ import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookProgress
 import io.legado.app.data.entities.BookSource
 import io.legado.app.exception.NoStackTraceException
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
 import io.legado.app.help.IntentData
 import io.legado.app.help.config.ReadBookConfig
 import io.legado.app.help.config.ReadTipConfig
 import io.legado.app.help.coroutine.Coroutine
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.help.storage.Backup
 import io.legado.app.lib.dialogs.SelectItem
 import io.legado.app.lib.dialogs.alert
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
index fdf8e11a1..4f2094184 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
@@ -14,11 +14,11 @@ import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookProgress
 import io.legado.app.data.entities.BookSource
 import io.legado.app.exception.NoStackTraceException
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
 import io.legado.app.help.ContentProcessor
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.coroutine.Coroutine
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.model.ReadAloud
 import io.legado.app.model.ReadBook
 import io.legado.app.model.localBook.LocalBook
diff --git a/app/src/main/java/io/legado/app/ui/book/remote/RemoteBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/remote/RemoteBookViewModel.kt
index 48eb6b934..87a7eff57 100644
--- a/app/src/main/java/io/legado/app/ui/book/remote/RemoteBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/remote/RemoteBookViewModel.kt
@@ -2,7 +2,6 @@ package io.legado.app.ui.book.remote
 
 import android.app.Application
 import android.net.Uri
-import androidx.lifecycle.MutableLiveData
 import io.legado.app.base.BaseViewModel
 import io.legado.app.model.localBook.LocalBook
 import io.legado.app.ui.book.remote.manager.RemoteBookWebDav
@@ -13,11 +12,7 @@ import kotlinx.coroutines.flow.flowOn
 import java.util.*
 
 class RemoteBookViewModel(application: Application): BaseViewModel(application){
-    private val remoteBookFolderName = "book_remote"
     private var dataCallback : DataCallback? = null
-    var isRemoteBookLiveData = MutableLiveData<Boolean>()
-    var dataFlowStart: (() -> Unit)? = null
-
 
     val dataFlow = callbackFlow<List<RemoteBook>> {
 
@@ -41,15 +36,18 @@ class RemoteBookViewModel(application: Application): BaseViewModel(application){
                 trySend(emptyList())
             }
         }
-//        withContext(Dispatchers.Main) {
-//            dataFlowStart?.invoke()
-//        }
 
         awaitClose {
             dataCallback = null
         }
     }.flowOn(Dispatchers.IO)
 
+    init {
+        execute {
+            RemoteBookWebDav.initRemoteContext()
+        }
+    }
+
     fun loadRemoteBookList() {
         execute {
             dataCallback?.clear()
@@ -58,8 +56,6 @@ class RemoteBookViewModel(application: Application): BaseViewModel(application){
         }
     }
 
-
-
     fun addToBookshelf(uriList: HashSet<String>, finally: () -> Unit) {
         execute {
             uriList.forEach {
diff --git a/app/src/main/java/io/legado/app/ui/book/remote/manager/RemoteBookWebDav.kt b/app/src/main/java/io/legado/app/ui/book/remote/manager/RemoteBookWebDav.kt
index c099180c3..995463f58 100644
--- a/app/src/main/java/io/legado/app/ui/book/remote/manager/RemoteBookWebDav.kt
+++ b/app/src/main/java/io/legado/app/ui/book/remote/manager/RemoteBookWebDav.kt
@@ -3,30 +3,22 @@ package io.legado.app.ui.book.remote.manager
 
 import android.net.Uri
 import io.legado.app.constant.PreferKey
-
 import io.legado.app.exception.NoStackTraceException
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.config.AppConfig
-
-import io.legado.app.lib.webdav.Authorization
 import io.legado.app.lib.webdav.WebDav
-import io.legado.app.lib.webdav.WebDavException
 import io.legado.app.lib.webdav.WebDavFile
-import io.legado.app.ui.book.info.BookInfoActivity
-
 import io.legado.app.ui.book.remote.RemoteBook
 import io.legado.app.ui.book.remote.RemoteBookManager
 import io.legado.app.utils.*
 import kotlinx.coroutines.runBlocking
-import kotlinx.coroutines.withTimeout
 import splitties.init.appCtx
 import java.io.File
-import java.nio.charset.Charset
 
 object RemoteBookWebDav : RemoteBookManager() {
-    private const val defaultWebDavUrl = "https://dav.jianguoyun.com/dav/"
-    private var authorization: Authorization? = null
     private val remoteBookUrl get() = "${rootWebDavUrl}${remoteBookFolder}"
     private val localSaveFolder get() = "${appCtx.externalFiles.absolutePath}${File.separator}${remoteBookFolder}"
+
     init {
         runBlocking {
             initRemoteContext()
@@ -36,7 +28,7 @@ object RemoteBookWebDav : RemoteBookManager() {
     private val rootWebDavUrl: String
         get() {
             val configUrl = appCtx.getPrefString(PreferKey.webDavUrl)?.trim()
-            var url = if (configUrl.isNullOrEmpty()) defaultWebDavUrl else configUrl
+            var url = if (configUrl.isNullOrEmpty()) AppWebDav.defaultWebDavUrl else configUrl
             if (!url.endsWith("/")) url = "${url}/"
             AppConfig.webDavDir?.trim()?.let {
                 if (it.isNotEmpty()) {
@@ -47,27 +39,17 @@ object RemoteBookWebDav : RemoteBookManager() {
         }
 
     override suspend fun initRemoteContext() {
-        kotlin.runCatching {
-            authorization = null
-            val account = appCtx.getPrefString(PreferKey.webDavAccount)
-            val password = appCtx.getPrefString(PreferKey.webDavPassword)
-            if (!account.isNullOrBlank() && !password.isNullOrBlank()) {
-                val mAuthorization = Authorization(account, password)
-                WebDav(rootWebDavUrl, mAuthorization).makeAsDir()
-                WebDav(remoteBookUrl, mAuthorization).makeAsDir()
-                authorization = mAuthorization
-            }
-        }.onFailure {
-            it.printStackTrace()
+        AppWebDav.authorization?.let {
+            WebDav(remoteBookUrl, it).makeAsDir()
         }
     }
 
     @Throws(Exception::class)
     override suspend fun getRemoteBookList(): MutableList<RemoteBook> {
         val remoteBooks = mutableListOf<RemoteBook>()
-        authorization?.let {
+        AppWebDav.authorization?.let {
             //读取文件列表
-            var remoteWebDavFileList : List<WebDavFile>? = null
+            var remoteWebDavFileList: List<WebDavFile>? = null
             kotlin.runCatching {
                 remoteWebDavFileList = WebDav(remoteBookUrl, it).listFiles()
             }
@@ -97,13 +79,13 @@ object RemoteBookWebDav : RemoteBookManager() {
     override suspend fun getRemoteBook(remoteBook: RemoteBook): String? {
         val saveFilePath= "${localSaveFolder}${File.separator}${remoteBook.filename}"
         kotlin.runCatching {
-            authorization?.let {
-                FileUtils.createFolderIfNotExist(localSaveFolder).run{
-                        val webdav = WebDav(
-                            remoteBook.urlName,
-                            it
-                        )
-                        webdav.downloadTo(saveFilePath, true)
+            AppWebDav.authorization?.let {
+                FileUtils.createFolderIfNotExist(localSaveFolder).run {
+                    val webdav = WebDav(
+                        remoteBook.urlName,
+                        it
+                    )
+                    webdav.downloadTo(saveFilePath, true)
                 }
             }
         }.onFailure {
@@ -122,10 +104,13 @@ object RemoteBookWebDav : RemoteBookManager() {
         val localBookName = localBookUri.path?.substringAfterLast(File.separator)
         val putUrl = "${remoteBookUrl}${File.separator}${localBookName}"
         kotlin.runCatching {
-            authorization?.let {
-                if (localBookUri.isContentScheme()){
-                    WebDav(putUrl, it).upload(byteArray = localBookUri.readBytes(appCtx),contentType = "application/octet-stream")
-                }else{
+            AppWebDav.authorization?.let {
+                if (localBookUri.isContentScheme()) {
+                    WebDav(putUrl, it).upload(
+                        byteArray = localBookUri.readBytes(appCtx),
+                        contentType = "application/octet-stream"
+                    )
+                } else {
                     WebDav(putUrl, it).upload(localBookUri.path!!)
                 }
             }
diff --git a/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt
index 4e535001f..c42a6187c 100644
--- a/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/BackupConfigFragment.kt
@@ -17,10 +17,14 @@ import androidx.preference.Preference
 import io.legado.app.R
 import io.legado.app.constant.AppLog
 import io.legado.app.constant.PreferKey
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.LocalConfig
 import io.legado.app.help.coroutine.Coroutine
-import io.legado.app.help.storage.*
+import io.legado.app.help.storage.Backup
+import io.legado.app.help.storage.BackupConfig
+import io.legado.app.help.storage.ImportOldData
+import io.legado.app.help.storage.Restore
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.permission.Permissions
 import io.legado.app.lib.permission.PermissionsCompat
diff --git a/app/src/main/java/io/legado/app/ui/config/ConfigViewModel.kt b/app/src/main/java/io/legado/app/ui/config/ConfigViewModel.kt
index fb79430ae..dc408842b 100644
--- a/app/src/main/java/io/legado/app/ui/config/ConfigViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ConfigViewModel.kt
@@ -3,8 +3,8 @@ package io.legado.app.ui.config
 import android.app.Application
 import io.legado.app.R
 import io.legado.app.base.BaseViewModel
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.utils.FileUtils
 import io.legado.app.utils.toastOnUi
 
diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index d179f5cd1..7eb32b074 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -21,11 +21,11 @@ import io.legado.app.constant.AppConst.appInfo
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
 import io.legado.app.databinding.ActivityMainBinding
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.BookHelp
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.LocalConfig
 import io.legado.app.help.coroutine.Coroutine
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.help.storage.Backup
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.theme.elevation
diff --git a/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt b/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
index 7998a9f9e..06022a617 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
@@ -10,10 +10,10 @@ import io.legado.app.constant.EventBus
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookSource
+import io.legado.app.help.AppWebDav
 import io.legado.app.help.DefaultData
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.LocalConfig
-import io.legado.app.help.storage.AppWebDav
 import io.legado.app.model.CacheBook
 import io.legado.app.model.webBook.WebBook
 import io.legado.app.service.CacheBookService