Other Usage‡ taking up 99% of space after deleting giant log file

Apologies in advance if this is obvious, but we just migrated our site, and noticed after some digging that our server space was filled up, with a 10 gb error log file. Rather than try to download and open it I deleted it, thinking the errors would just continue to occur and I could take a look then. But after deleting the error log file in cpanel, that 10 gb is now in Other Usage" and I the server is still full. Any thoughts?