As the title says, I have directories on a Ext4 filesystem that I want to backup to a repo on an NTFS filesystem. Drive is shared by different OS’s, so needs to be NTFS for compatibility, but each OS has its own repo, and restores will be back to the native/original file system. Are there any issues that I might face, especially on restore (assuming that the Ext4 backups will be restored/mounted back to an ext4 filesystem)? E.g., will files/directories lose permissions or have all the executable bits set on restore?
The format of restic’s files and folders is so simple, that pretty much any filesystem should be able to handle it.
So yes, NTFS is perfectly fine.