diff --git a/kernel/conf/backup.go b/kernel/conf/backup.go
deleted file mode 100644
index 8ccf40c13..000000000
--- a/kernel/conf/backup.go
+++ /dev/null
@@ -1,34 +0,0 @@
-// SiYuan - Build Your Eternal Digital Garden
-// Copyright (c) 2020-present, b3log.org
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-package conf
-
-import (
-	"path/filepath"
-
-	"github.com/siyuan-note/siyuan/kernel/util"
-)
-
-type Backup struct {
-}
-
-func NewBackup() *Backup {
-	return &Backup{}
-}
-
-func (b *Backup) GetSaveDir() string {
-	return filepath.Join(util.WorkspaceDir, "backup")
-}
diff --git a/kernel/conf/sync.go b/kernel/conf/sync.go
index dd4919814..ed880d24e 100644
--- a/kernel/conf/sync.go
+++ b/kernel/conf/sync.go
@@ -16,12 +16,6 @@
 
 package conf
 
-import (
-	"path/filepath"
-
-	"github.com/siyuan-note/siyuan/kernel/util"
-)
-
 type Sync struct {
 	CloudName string `json:"cloudName"` // 云端同步目录名称
 	Enabled   bool   `json:"enabled"`   // 是否开启同步
@@ -37,7 +31,3 @@ func NewSync() *Sync {
 		Mode:      1,
 	}
 }
-
-func (s *Sync) GetSaveDir() string {
-	return filepath.Join(util.WorkspaceDir, "sync")
-}
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index 9d624c0b5..a3125c13b 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -64,7 +64,6 @@ type AppConf struct {
 	AccessAuthCode string           `json:"accessAuthCode"` // 访问授权码
 	System         *conf.System     `json:"system"`         // 系统
 	Keymap         *conf.Keymap     `json:"keymap"`         // 快捷键
-	Backup         *conf.Backup     `json:"backup"`         // 备份配置
 	Sync           *conf.Sync       `json:"sync"`           // 同步配置
 	Search         *conf.Search     `json:"search"`         // 搜索配置
 	Stat           *conf.Stat       `json:"stat"`           // 统计
@@ -231,23 +230,9 @@ func InitConf() {
 		Conf.Account = conf.NewAccount()
 	}
 
-	if nil == Conf.Backup {
-		Conf.Backup = conf.NewBackup()
-	}
-	if !gulu.File.IsExist(Conf.Backup.GetSaveDir()) {
-		if err := os.MkdirAll(Conf.Backup.GetSaveDir(), 0755); nil != err {
-			logging.LogErrorf("create backup dir [%s] failed: %s", Conf.Backup.GetSaveDir(), err)
-		}
-	}
-
 	if nil == Conf.Sync {
 		Conf.Sync = conf.NewSync()
 	}
-	if !gulu.File.IsExist(Conf.Sync.GetSaveDir()) {
-		if err := os.MkdirAll(Conf.Sync.GetSaveDir(), 0755); nil != err {
-			logging.LogErrorf("create sync dir [%s] failed: %s", Conf.Sync.GetSaveDir(), err)
-		}
-	}
 	if 0 == Conf.Sync.Mode {
 		Conf.Sync.Mode = 1
 	}
@@ -505,10 +490,10 @@ func InitBoxes() {
 	blockCount := 0
 	if 1 > len(treenode.GetBlockTrees()) {
 		if gulu.File.IsExist(util.BlockTreePath) {
-			util.IncBootProgress(30, "Reading block trees...")
+			util.IncBootProgress(20, "Reading block trees...")
 			go func() {
 				for i := 0; i < 40; i++ {
-					util.RandomSleep(100, 200)
+					util.RandomSleep(50, 100)
 					util.IncBootProgress(1, "Reading block trees...")
 				}
 			}()