externa enclosures take a internal hard disk, and they change it to exterior hard disk. That was useful if you want some additional place for your desktop, or if you need the access of your hard drive of your laptop from your computer. for these reasons, you should learn all these to know in order to select correct for you.

You should check the size of your hard drive of your computers.if you use an Laptop,the hard drives use to be 2.5 inches , even some laptop are 1.8 inches.for a Desktop, the hard drives almostly are 3.5 inches. You should use the same size in your hard drive with your enclosures. but there are some other types like 5.25 inches,which was used in housing cd/dvd drives,should also have 3.5 inches hard drives,and some of 3.5 inches enclosures also can fit for 2.5 inches hard drives.

You should check the types of your hard drives.IDE,PATA OR SATA? You Should buy a enclosure that support the type of your hard drive.IDE/PATA are older types and the SATA have faster transfer rates.if you have more than one SATA hard drives,find some external raid enclosure for faster speed and safety.

You should check if you need a fans for you enclosures.usually the enclosures have built-in fans to make sure that the hard drives works nice and keep cold.but on the other hand,it could bring your some more noise.so if you didn’t like the extra noise,don’t get a enclosure with a fan

What material to use.there are some kinds of materials for enclosures,Plastic,aluminum and metal.be aware those enclosures made of plastic,to keep your hard drive cook,aluminum or metal enclosures can really works better than the plastics.

The power.Get a enclosures that use a AC adapter for power.USE can used in the connections,but it’s really dangerous and unstable for those power the drive only with USB port.

So you can easily find the external enclosures that you need.other advice,if you have more hard drives,want more fast speed and stable,just choose an external raid enclosure.