That would be a file/folder permissions issue, not a filesystem-specific thing.
Check how your drive is mounted. I think since Linux developers don't consider their driver for a proprietary file system unstable it usually mounts read-only. You would have to explicitly mount it read-write - but don't cry if it destroys your data.
EDIT: since you said other programs can write to it it must be something else. What about a log and error string?
The snap install is not an official package, and you using it may be the cause of the problem.
pacman isn't official either.
Only the ubuntu PPA is.
The only official packages are from the ubuntu ppa from the download page.
all other linux packages are provided by third parties.