A non-root Thunar instance will not let me do ANYTHING to files on another partition or USB drive other than view them. Rapid transfer of large downloaded mp4 files from main HDD/SSD to an auxiliary archive HDD cannot be done (by me) in anything other than Win7--certainly not with MX with (to me) stoopid limitations of non-root Thunar. As was essentially confirmed by skidoo
Well, the intended workflow was detailed in post #1. I fully understand/agree the PITA azrielle described (non-root filemanager instances impose the need to request/elevate permissions for each granular, or batched, file/move/copy operation).
Excuse me but, coming from a Windows perspective, where user stupidity could ultimately end up costing another $150 for another official instance of the OS (which I didn't have), I understand the danger, such that it is. BUT, as MX is free to use and abuse (and reinstall if necessary), for a CASUAL USER such as myself, I fail to embrace the near constant hullabaloo that operating as root is BAD. I mean "So what if I F-up the home or system files? What's the worst that can happen FOR ME? That I have to spend an hour reinstalling (FOR FREE!) my favorite OS? Would that all my screw-ups had such exiguous consequences.I do actually never - or can't recall when I - have used Thunar as root user.
As this is fairly dangerous for the systems if normal user have Thunar as root user open,
I do always disable access to Thunar as root for systems I do support (for normal user).