diff --git a/pkg/storage/sftp.go b/pkg/storage/sftp.go
index 75900fc4..d0d2ba96 100644
--- a/pkg/storage/sftp.go
+++ b/pkg/storage/sftp.go
@@ -32,7 +32,7 @@ func NewSFTP(config SFTPConfig) (Storage, error) {
 	if config.Timeout == 0 {
 		config.Timeout = 30 * time.Second
 	}
-	config.BasePath = strings.Trim(config.BasePath, "/")
+	config.BasePath = strings.TrimSuffix(config.BasePath, "/")
 
 	if config.Username == "" || (config.Password == "" && config.PrivateKey == "") {
 		return nil, fmt.Errorf("username and either password or private key must be provided")
@@ -139,6 +139,11 @@ func (s *SFTP) List(path string) ([]string, error) {
 	}
 	defer cleanup()
 
+	// 确保基础路径存在
+	if s.config.BasePath != "" {
+		_ = client.MkdirAll(s.config.BasePath)
+	}
+
 	remotePath := s.getRemotePath(path)
 	entries, err := client.ReadDir(remotePath)
 	if err != nil {
diff --git a/pkg/storage/webdav.go b/pkg/storage/webdav.go
index 229f73c0..09e92b53 100644
--- a/pkg/storage/webdav.go
+++ b/pkg/storage/webdav.go
@@ -27,7 +27,7 @@ func NewWebDav(config WebDavConfig) (Storage, error) {
 	if config.Timeout == 0 {
 		config.Timeout = 30 * time.Second
 	}
-	config.BasePath = strings.Trim(config.BasePath, "/")
+	config.BasePath = strings.TrimSuffix(config.BasePath, "/")
 
 	client := gowebdav.NewClient(config.URL, config.Username, config.Password)
 	client.SetTimeout(config.Timeout)
diff --git a/web/src/views/backup/AccountView.vue b/web/src/views/backup/AccountView.vue
index 934f15d4..b56fdc6f 100644
--- a/web/src/views/backup/AccountView.vue
+++ b/web/src/views/backup/AccountView.vue
@@ -21,6 +21,11 @@ const styleOptions = [
   { label: 'Path', value: 'path' }
 ]
 
+const sftpAuthOptions = [
+  { label: $gettext('Password'), value: 'password' },
+  { label: $gettext('Private Key'), value: 'private_key' }
+]
+
 const defaultModel = {
   type: 's3',
   name: '',
@@ -33,8 +38,10 @@ const defaultModel = {
     bucket: '',
     host: '',
     port: 22,
-    user: '',
+    username: '',
     password: '',
+    private_key: '',
+    auth_type: 'password',
     path: ''
   }
 }
@@ -275,11 +282,18 @@ onMounted(() => {
         </n-form-item>
         <n-form-item :label="$gettext('Username')" required>
           <n-input
-            v-model:value="createModel.info.user"
+            v-model:value="createModel.info.username"
             :placeholder="$gettext('Enter username')"
           />
         </n-form-item>
-        <n-form-item :label="$gettext('Password')" required>
+        <n-form-item :label="$gettext('Auth Type')" required>
+          <n-select v-model:value="createModel.info.auth_type" :options="sftpAuthOptions" />
+        </n-form-item>
+        <n-form-item
+          v-if="createModel.info.auth_type === 'password'"
+          :label="$gettext('Password')"
+          required
+        >
           <n-input
             v-model:value="createModel.info.password"
             type="password"
@@ -287,6 +301,18 @@ onMounted(() => {
             :placeholder="$gettext('Enter password')"
           />
         </n-form-item>
+        <n-form-item
+          v-if="createModel.info.auth_type === 'private_key'"
+          :label="$gettext('Private Key')"
+          required
+        >
+          <n-input
+            v-model:value="createModel.info.private_key"
+            type="textarea"
+            :rows="5"
+            :placeholder="$gettext('Enter private key')"
+          />
+        </n-form-item>
         <n-form-item :label="$gettext('Path')" required>
           <n-input
             v-model:value="createModel.info.path"
@@ -305,7 +331,7 @@ onMounted(() => {
         </n-form-item>
         <n-form-item :label="$gettext('Username')" required>
           <n-input
-            v-model:value="createModel.info.user"
+            v-model:value="createModel.info.username"
             :placeholder="$gettext('Enter username')"
           />
         </n-form-item>
@@ -406,9 +432,19 @@ onMounted(() => {
           />
         </n-form-item>
         <n-form-item :label="$gettext('Username')" required>
-          <n-input v-model:value="editModel.info.user" :placeholder="$gettext('Enter username')" />
+          <n-input
+            v-model:value="editModel.info.username"
+            :placeholder="$gettext('Enter username')"
+          />
         </n-form-item>
-        <n-form-item :label="$gettext('Password')" required>
+        <n-form-item :label="$gettext('Auth Type')" required>
+          <n-select v-model:value="editModel.info.auth_type" :options="sftpAuthOptions" />
+        </n-form-item>
+        <n-form-item
+          v-if="editModel.info.auth_type === 'password'"
+          :label="$gettext('Password')"
+          required
+        >
           <n-input
             v-model:value="editModel.info.password"
             type="password"
@@ -416,6 +452,18 @@ onMounted(() => {
             :placeholder="$gettext('Enter password')"
           />
         </n-form-item>
+        <n-form-item
+          v-if="editModel.info.auth_type === 'private_key'"
+          :label="$gettext('Private Key')"
+          required
+        >
+          <n-input
+            v-model:value="editModel.info.private_key"
+            type="textarea"
+            :rows="5"
+            :placeholder="$gettext('Enter private key')"
+          />
+        </n-form-item>
         <n-form-item :label="$gettext('Path')" required>
           <n-input
             v-model:value="editModel.info.path"
@@ -433,7 +481,10 @@ onMounted(() => {
           />
         </n-form-item>
         <n-form-item :label="$gettext('Username')" required>
-          <n-input v-model:value="editModel.info.user" :placeholder="$gettext('Enter username')" />
+          <n-input
+            v-model:value="editModel.info.username"
+            :placeholder="$gettext('Enter username')"
+          />
         </n-form-item>
         <n-form-item :label="$gettext('Password')" required>
           <n-input