I bought one from Craigslists and it came without HDD, traded it for an iPad. Now I don't know whch HDD whould I get or what HDD is for the MBA that I have in which is the A1304 model, I've searched but kind of confused, since I am new to OS X, been on windows for years, if anybody can help me out trying to figure out which HDD would fit my MBA, it would be awesome, I would like to get the highest GB, SDD or just regular, thanks in advance.