Error is said to be an issue with space?
No, 28 is space.
It only affects the /var partition on the server - please tell your host this. It is not the whole hard drive, just that one part.
Here are some common MySQL errors and their solutions:
Got error 28 from table handler
This means you are out of disk space. Either ask your host to give you more space, try to remove any backup tables, or remove old posts. Removing files from your FTP will not affect this error - only database-related data. It probably needs to be solved by your host.