我正在尝试编写一个脚本，该脚本最终将进入 crontab 并每隔一段时间执行一次。我想将目录从我的硬盘备份到我的 USB 驱动器。以下是脚本：
SOURCE_DIR="/home/user/mc-server-files"
BACKUP1="/home/user/sandisk-usb"
rsync -urDvz --delete "$SOURCE_DIR" "$BACKUP1"
在放入 crontab 之前，我想测试一下，但是当我运行脚本时，source /home/user/scripts/3day-san-backup.sh我得到了以下信息
sending incremental file list
rsync: [generator] recv_generator: mkdir "/home/user/sandisk-usb/mc-server-files" failed: Permission denied (13)
*** Skipping any contents from this failed directory ***
mc-server-files/
sent 37,588 bytes received 338 bytes 75,852.00 bytes/sec
total size is 2,099,733,334 speedup is 55,363.95
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1338) [sender=3.2.7]
我自己创建目录后，我又遇到了一些错误：
sending incremental file list
mc-server-files/banned-ips.json
mc-server-files/banned-players.json
mc-server-files/bukkit.yml
mc-server-files/commands.yml
mc-server-files/eula.txt
mc-server-files/help.yml
mc-server-files/ops.json
mc-server-files/permissions.yml
mc-server-files/server-icon.png
mc-server-files/server.properties
mc-server-files/spigot.yml
mc-server-files/usercache.json
mc-server-files/version_history.json
mc-server-files/whitelist.json
rsync: [generator] recv_generator: mkdir "/home/user/sandisk-usb/mc-server-files/cache" failed: Permission denied (13)
*** Skipping any contents from this failed directory ***
rsync: [generator] recv_generator: mkdir "/home/user/sandisk-usb/mc-server-files/config" failed: Permission denied (13)
*** Skipping any contents from this failed directory ***
还有更多输出，但不适合这里。我需要更改哪些权限？
此外，以下是来自的权限ls -l：
drwxrwxrwx+ 11 mc-runner minecraft-runners 4096 Jun 18 15:41 mc-server-files
mc-runner 无法运行 sudo 命令，但我的用户（可以运行 sudo）属于 minecraft-runners 组