I think ur solution is good, so i think i need to find some cotton and cut like ur pic. By the way, ur case is NZXT S340 ELITE? Im thinking if it doesnt work, i will buy a new case, maybe NZXT S340, hope it doesnt has the same problem. And thank u a lot!
Yah, but my 1T WD BLUE Hard Driver is almost full, only 60G left. So i wont RMA my HDD (transfer datas is too inconvenient and the dealer probably wouldnt accepct this RMA order), i think use some cotton like WoodenMaker's picture may solve this problem but im worring about the heat from HDD... So im also looking for some New Case which doesnt have the same problem, can u recommend some for me? Really thank you.