Preparing my V4.7.20 database to move to V5 : changing tables engine to innoDB, optimizing, etc ...

I have a monstrous table : gallery_bandwidth that is 3,5 Go (my table for forum_posts is 700 Mo for 7k messages, my core_search_index base is 1,1 Go)
What is the use of this table ? Is there a way to minify it ???

Thanks !

If you go to Community>Gallery>Settings in your admin CP, you will see you can set that for how long you wish the system to keep those logs for. If you reduce that, it will reduce the size of your able

Thank you very much
If I switch of recording logs, do I have to empty table manually ?

Edited March 7Mar 7 by Philooo

It should empty itself.