[Bug] 不支持FAT32格式的外置设备

[huangsijun17]

Describe the bug 插了个FAT32文件格式的U盘，显示不支持的格式。

To Reproduce 插了个FAT32文件格式的U盘。

Expected behavior 可以被选为外部设备。

Screenshots

Smartphone (please complete the following information):

• Device: 1+11
• OS: COS13, Android13
• Version: Beta-4.3.16fix

Additional context

[XayahSuSuSu]

Fat23/Vfat 单文件最大只能支持4GB，不适用于部分备份场景，建议格式化为ntfs或exfat

[naanmisan157]

Try to Add split files system feature As all custom rom doesn't support exfat. but fat32 is universal..