Comet Chat vestiges
Using Jamroom
You have a load of old CC tables on your database from when (I think) CC was installed directly, before it was a JR module. The jrBackup module is seeing these every day and archiving them. That is why them keep re-appearing in that data/media/1/0 folder.
If the CC module has been disabled and removed (it looks like it has) and you are not going to use it again, I think its safe to delete (or 'drop' in database speak) those tables.
Goto ACP=>Developer=>Tools=>Database Admin then select all the CC tables, scroll down and click on 'Drop'. Be careful what you're doing there though - one wrong click on a needed JR table could break your site