HDD OR SSD
what is 2.5 external hdd /internal hdd what is 3.5 external
hdd/internal hdd
that is just how big the hard drive is. 2.5 inches or 3.5
inches
HDD is your classic magnetic hard drive. They are typically
cheaper per GB, require defragmentation and have a chance to fail the longer
you have it.
SSD is the new storage devices. They have no moving parts,
they are faster, they have almost no chance of failing, they do not require
defragmentation, and more expensive per GB.
Most people get a HDD for general storage, and a SSD to
store your OS on it for faster boosts and store a few games where you want
faster start up times. Since the read and write are alot faster.