Decrypting files in the snap nextcloud

Hi there,

I’m having a big problem with the decrypting my files with the snap nextcloud installation. Basically, I would like to move to the normal installation, and when I took out the external hard drive and tried to put it to the other laptop I just found out that I cannot open some of the files(I had a couple of problems with the server, restarted the snap a couple of times, but the files were ok).

What can I do to solve the problem?
Any ideas guys?