An external SSD is a small drive with no moving parts that holds files outside your computer. The right one depends on how much you store, which port your computer offers, and whether you carry it around or leave it on the desk.
Work out the capacity you need
Add up the files you want to hold now, then leave generous room for growth. Photos, video and project files grow faster than most people expect. If you plan to keep a full copy of your computer, the drive should be at least as large as the data you are copying, and larger if you want to keep older versions.
Interface and cable
The drive, the cable and the computer’s port all affect how quickly files move. The slowest of the three sets the pace. Read the maker’s notes on the port type and check that the cable in the box matches your computer.
- Look at the connector shape on both your computer and the drive.
- Check whether an adapter is needed for older ports.
- Remember that speed figures quoted by makers are peak numbers, so treat them as a rough guide.
Build and portability
Solid state storage has no spinning parts, so it tolerates being carried better than a spinning disk. Still, the case matters. A metal shell helps spread heat, while a rubber sleeve cushions bumps. If you work in a garage or workshop, think about dust and where the drive will rest.
Quick comparison of use cases
| Use | Main concern | What to look for |
|---|---|---|
| Carrying files between places | Size and toughness | Compact case, short cable |
| Editing from the drive | Steady transfer | Interface that matches your port |
| Keeping copies of a computer | Room for history | Larger capacity |
| Use with a tablet or phone | Connector match | Support listed by the maker |
Heat is worth a thought. Drives that move a lot of data can grow warm, so leave some air around the case and avoid covering it with papers or cloth. Name the drive clearly in your computer’s settings so you can tell it apart from other storage. Before you rely on it, copy a handful of files to it and open them again to confirm that everything reads correctly. Finally, keep the maker’s guide for notes on safe removal and on any software that came with the drive.
FAQ
Is an SSD safer than a hard drive for backups?
Neither is a perfect home for your only copy. Any drive can fail, so keep a second copy of anything important in another place.
Do I need to format it before use?
Many come ready to use, but formats differ between computer systems. Check the maker’s guide to see which format suits the machines you use.
The Short Version
Choose capacity with room to grow, match the connector to your computer, and choose a case that fits where you will use it. Keep a second copy of anything you cannot replace.