Hey, I like your name, useless-semicolon; hope you enjoy your time here. 
I'm having a hard time understanding the problem, but I think it's because I need to see what you're seeing.
Your files application should be Nautilus on Ubuntu. Is that correct? This is the "default" files application. You shouldn't need to install it. From what I've read online, it should be compatible. You should receive a popup asking for your password to decrypt it. If you're not, I think you might have an issue with the drive. Either it's a file system that Ubuntu cannot recognize and/or it's corrupted somehow (common issue).
You can check your drive with the following terminal tutorial.
Code:
lsblk | grep disk
sudo badblocks -w -s -o error.log [path to usb]
cat error.log
Link to tutorial and other helpful tips: https://www.cyberciti.biz/faq/linux-...k-flash-drive/
So far I think this sounds like a corrupted drive issue. This happens when you format the USB with a filesystem that Ubuntu cannot read or you have some read/write issues when writing to the disk from a different system. This commonly happened to me when I relied on USBs. Today I transfer a lot of my personal documents from a Nextcloud server from my LAN. You can refer to this tutorial: https://www.digitalocean.com/communi...n-ubuntu-20-04
Bookmarks