The project has a full memory error, but I am not storing data

Although I do not store the data in my project, it has been giving a memory full warning for the last 1 week. I think some data in hidden files is blocking the system. Because I had added and deleted some large json files. And it started to happen some time after I deleted them anyway.

I don’t know how to see and delete hidden files. Please can someone help?

“Memory” here refers to the RAM usage, not disk usage. Your hidden files might be fine.