I'm using a virtual machine to run a Java web app. The OS is XFCE (Ubuntu) and I found the files that I want with the command find -name "something". These files are in ./.local/share/Trash/... So, I would like to know what is this repository? (Because the "trash" is freaking me out!)
You probably don't want to store things in that trash folder. It's where deleted files go when a sudo user has deleted them as root.
See, for example, https://askubuntu.com/questions/246888/why-does-local-share-trash-still-use-lots-of-space-even-after-emptying-the-tr