Background:
I'm fairly new to Linux and just getting used to it.
I use fsearch to quickly find files (because my filenaming convention helps me to get nearly everything in mere seconds). Yesterday I decided to let it index from root and lower instead of just my home folder.
Then I got a lot of duplicate files. For example in subfolders relating to my mp3 player I even discovered my whole NextCloud 'drive' is there again:
/run/user/1000/doc/by-app/org.strawberrymusicplayer.strawberry/51b78f5c/N
Searching:
Looking for answers I read these, but couldnt make sense of it.
That duplicate of your folder in /run is due to filesystem links (or more likely a fuse mount, I've never actually looked into how flatpak works). But either way, they aren't copies of the data.