Alexander Skwar wrote:
> Do I need all those files? What do I need them for in the first
> place? Can I delete old files?

Yes, you can delete these, unless you need them for replication support
or for data recovery. See
http://dev.mysql.com/doc/refman/5.0/en/binary-log.html

That page says: "You can delete all binary log files with the RESET
MASTER statement, or a subset of them with PURGE MASTER LOGS."

Regards,
Bill K.