Five things to look out for

1

Traditional hard disks tend to be cheaper, however, they are slower than SSD models.

2

The best-value hard drives on the market right now are often found in mid-range capacities.

3

These drives are designed to sit on your desktop; for on-the-go backup you’ll need a portable model.

4

Some drives have an SD slot, to backup images straight from a memory card without using a computer.

5

All drives connect via USB, but some have extra interfaces, like Ethernet for use on a home network.