Hello, recently I found this software called gocryptfs, its a file encryption tool for linux, i think itsfoss should do a review on this app, of course its open-source, you can also use a GUI tool called sirikali if you’re uncomfortable with the terminal, tell me what you think about gocryptfs!
-https://github.com/rfjakob/gocryptfs gocryptfs Github link to download
-https://www.howtogeek.com/686779/how-to-encrypt-files-with-gocryptfs-on-linux/ a guide on using gocryptfs