Error "There is not enough space on WordPress", 1.66 KB is needed to copy this item, Delete or move files so you have enough space which caused the web down, but we added free space on VM. Is anyone/superstar able to help with the final solution for this problem? The temporary solution is to restore the whole, but this will happen regularly.
There is likely a lot file hogging the space.
Check for an error file in the site’s root directory and under wp-admin. Check for a debug log under wp-content. Delete those files and that log file if it exists. Delete the cache directory under /wp-content/cache/.
Then optimize the site’s database to reduce its size. The database might have been filled with transients.
Use the site health tools under Dashboard > Tools to see how much space is available to the WordPress site.