The finny thing is that , THAT is my backup drive, mostly. It has lots of crap, including GB synced from Google Drive (photos being the mos important). Other than that, it's stuff I could re-download from elsewhere, but 3TB is a lot to re-download. Aah yeah and it also has the TimeHift backups.

I thought of going EXT4 , but as you said, NTFS is more widely supported.