Because a file manager app asking for Full Disk Access is not suspicious, and Full Disk Access is one hell of a good way to get access to data to exfiltrate. There likely wouldn't even be suspicion if it also asked for Internet access: if it supports connecting to network shares, you wouldn't think twice about it having that permission.
Simple File Manager Pro is FOSS. Just use this if you have to get a third party file manager.
Because a file manager app asking for Full Disk Access is not suspicious, and Full Disk Access is one hell of a good way to get access to data to exfiltrate. There likely wouldn't even be suspicion if it also asked for Internet access: if it supports connecting to network shares, you wouldn't think twice about it having that permission.
Simple File Manager Pro is FOSS. Just use this if you have to get a third party file manager.
https://f-droid.org/packages/com.simplemobiletools.filemanager.pro/
Also Material Files or Amaze are good and well-known ones.