I have a 2TB external hard drive that will primarily be used for backing up important documents and storing big files from an Ubuntu-based distros.
I have had issues before with NTFS as a broken file system would often require to use Windows to fix it, which definitely rules it out for me.
Is there a file system that would be suited for this use, while being both interoperable (i.e. usable on OSX, Windows and GNU/Linux) and (ideally) an open standard?
Have you ever tried Exfat?
It's compatible with Windows and OSX, and can be added to Linux by running:
It's very popular on sd cards etc.
Another option is UDF but I've never used it https://en.wikipedia.org/wiki/Universal_Disk_Format