permission/access problem always relative to the drive permissions, set urs to always read/write, or u can create for urself special authorizations in terminal so u can create and modify files as u like on any drive (external/internal), this type of problems exists in those non gaming distros alot, if u are a gaming focused person just switch to steamOS or nobara or zorinOS they are plenty out there u just have to find the one who suits u the most, if u need guidance i can record a tutorial vid and send it to u in ur dms.