my mac air is 150 gb and i have 48 gb free how can I CLEAN install mavericks on anothe rdrive in the free space? I only have one drive as of now, and when i do it,i will be able to access the 200 gb from the current drive when i use mavericks on drive B(yet to be made) right? this wont format or do anything on current drive A right? also,i deleted mavericks installer like 5gb after installing it, so do i have to download it all over again,or not? is there a way to download it without doing a new download? any drawbacks of this process? after the process? how much space will it eat up of the 48gb other than the 5gb mavericks installer, after the clean install? like,how much mavericks occupy? on a very side note, the ONLY REASON IM DOING THIS IS BECAUSE MAVERICKS FINDER KEEPS CRASING AND ITS CRASHED MORE THAN 300 TIMES IN LAST FEW MONTHS ,I INSTALLED ON THE SAME DAY MAVERICKS CAME OUT! AND ITS BECOME VERY SLOW OVER TIME ,NOT SURE WHY BUT THATS THE CASE. HELP PLEASE. thanks ---------- wow just read partitioning will erase the disk fully? like format it? just because i create a new HDD partition,really??