Error in Disc Space?

[ijob]

I've just recently updated Plesk on my VPS to 8.6.0.

My disc space has jumped from just under 5gb to 6gb used!

Any idea what has happened?

Cheers

 

[ijob]

some suggestions/ solutions would be appreciated

 

[ijob]

perhaps its possible that during the upgrade, installation files weren't deleted?

Where will I locate these?