My Octoprint files area is getting a bit messy - I wanted to delete some stuff, and create some folders to clean up. I'm finding that deleting and/or moving multiple files a bit tedious
Feture request to be able to have a check box next to files - check the ones I want to delete/move, then action it with a delete or move - so it can be done more efficiently.
Yeah, that plugin author has kind of gone away and has a couple of plugins that aren't really maintained anymore. I typically check the network section of insights and PRs on the repo to see if there are any other forks that have been updated, etc.in that case. Since you've been working with FOSS since the 80s you probably already know that trick though. This one specifically though doesn't look like it really has either.
Quickest way is to ssh onto the Pi and use the command line to locate the uploads / folders - which you will find at ~/.octoprint/uploads.
You might have to connect the pi up to a screen and keyboard to set/reset the pi user password.
I use ssh-copyid from my Ubuntu laptop to copy my ssh key over to each pi so I only have to set the password when I boot and configure for the first time. Then its no more passwords.