Different disk usage after transfer

view story

http://forums.cpanel.net – Hello, I'm transferring my accounts to my new server. After completion of the transfer, I found that the disk space usage of each account on the new server is different than the original usage. for example mysql of an account was using only 30MB on the old server but it becames more than 1.5GB on the new server! or another account was 5GB on the old server but it becames 1.5GB on the new server. It's too strange. I'm using "Restore a full backup / cpmove file" option in WHM. Please help me how do I fix it? My old server will be expired in the next 24 hours and I've to transfer all (HowTos)