A:Answer The biggest difference between SSD and HDD is that HDD is what is commonly found in mid and low grade PCs, and they contain a disk in the center of them that stores data. SSD is relatively the same as HDD but it’s all electronic (no internal memory disk) and because SSD is all electronic, the data processes that occur within them is faster, more stable, and if you’re tech savvy you can actually create unique encryptions on them that can be as simple as a front door code or as detailed as binary code (i.e. 1001010001110001).