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Portable SSD vs external hard drive: which one for backups, games and carrying files

An external hard drive gives more space for the money; a portable SSD gives speed and shock tolerance. Here is how to decide based on what you put on the drive.

By The PC Journal7 min read

The short answer

Use an external hard drive when you need a lot of space for backups and archives at the lowest cost per terabyte, and a portable SSD when you will open files from it, carry it around or run games or projects off it. For anything you cannot afford to lose, one drive is not a backup in either case.

What changes between the two

An external hard drive stores data on spinning platters read by a moving head. Because of that, access is slower, especially for lots of small files, and the drive is more sensitive to knocks while it is running. In exchange, large capacities cost less per terabyte, so it is the usual choice for archives and full-system backups.

A portable SSD uses flash memory with no moving parts. It starts instantly, handles many small files well and tolerates movement better, which suits a drive you slip into a bag. It costs more per terabyte, and the available capacities at a given budget are usually lower.

Both connect by USB, and the interface speed sets the ceiling. A hard drive will not use more than a 5 Gbps link, while an SSD can use a faster port, so check the port and cable if you want the speed you paid for. The related guide on USB speed names explains how.

Side by side

Portable SSDExternal hard drive
SpeedMuch faster for large and small files; limited by the USB linkSlower, especially with many small files
Cost per terabyteHigherLower
Capacity optionsCommonly 500 GB to a few TBOften available in larger sizes
Shock and vibrationNo moving parts, so it handles movement betterMore sensitive while running
NoiseSilentAudible spinning and seeking
PowerUsually bus-powered with low drawMany 2.5-inch models are bus-powered; some larger 3.5-inch drives need a wall adapter

Which one fits

Portable SSD

Choose this if

  • You edit video or photos directly from the drive
  • You carry the drive between computers
  • You want to run a game library or a project that loads a lot of small files

External hard drive

Choose this if

  • You store backups, archives or media you rarely open
  • You need many terabytes without a large budget
  • The drive sits on a desk and is not moved while running

Both

Choose this if

  • You want a fast drive for current work and a larger one for a second copy
  • You follow a backup plan with more than one copy and at least one stored elsewhere

Set up a backup that does not rely on one drive

  1. Keep a second copy

    A common rule is three copies on two kinds of media with one off-site. Even a single extra copy on a different drive reduces the risk of one failure wiping out your files.

  2. Label and date it

    Write what the drive holds and when it was last updated, so you know which copy is current.

  3. Eject before unplugging

    Use Safely Remove Hardware in Windows. Pulling the cable mid-write can corrupt files on both types of drive.

  4. Check the files occasionally

    Open a few files from the backup. A copy you have never opened may not be the copy you think it is.

Mistakes to avoid

  • Treating one external drive as a backup of your only copy

    Instead: Make sure the files exist in at least two places.

  • Buying a hard drive for a game library or video editing

    Instead: Use an SSD where load times and scrubbing speed matter.

  • Moving a running hard drive

    Instead: Let it spin down or eject it first.

Where to go next

  1. Best external SSDs
  2. Best external hard drives
  3. NVMe vs SATA SSD
  4. Setting up an external SSD

Sources

  1. USB Implementers ForumUSB-IF · Reference

This guide explains a decision process. It does not contain product rankings, benchmark results or hands-on measurements. How we research

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