How to check large-file write speed on an old gaming laptop

Your older gaming laptop takes longer to install games, copy recordings, or save large files than it used to. A write-speed check can show whether its storage is unusually slow, but the result can also change with heat, power mode, and background activity.

Use the Storage Test to measure large-file read and write speed in your browser. Compare a few runs under the same conditions before deciding whether the drive is the problem.

Check large-file write speed

1. Plug the laptop into its charger and close games, launchers, downloads, and other heavy tasks. Keep the laptop on a hard, level surface so its vents are not blocked.
2. Open the Storage Test in the browser you normally use. Let the test finish without switching to a demanding app or putting the laptop to sleep.
3. Record the large-file write speed and the read speed shown in the results. Note whether the laptop was plugged in, which browser you used, and whether its fans were already running loudly.
4. Wait a few minutes, then run the test again with the same setup. If you want to compare battery and charger performance, do that as a separate pair of runs rather than changing conditions midway through a comparison.

Use the same browser and power state for your main comparison. A single result is only a snapshot, not a verdict on the drive. If the scores are close between runs, small differences may come from normal changes in the browser or laptop workload.

What the result means

Write speed is low, but read speed looks normal

The drive can retrieve data faster than it writes it in this test. That can happen because of the drive itself, available space, a write cache, or the laptop's temperature and power limits. A low write result alone does not prove the drive is failing. Repeat the test after the laptop has cooled and background work has stopped.

For more context on this kind of difference, see how to interpret storage test read and write speeds.

Both read and write speeds are low

The limitation may affect the whole storage path, not just writing. A nearly full drive, an older hard drive, a slower connection, or background activity can all contribute. Compare the result with another run on the same laptop after closing other work, rather than comparing it with a number from a different computer.

Write speed drops on later runs

A drive can write quickly for a short burst and slow down during longer activity. Heat can also reduce performance, particularly in a compact gaming laptop with dusty vents or limited airflow. Give the laptop time to cool, then compare a fresh run with the later one. Why SSD speed drops during thermal throttling explains one common cause.

The results change a lot between runs

Look for changing conditions before blaming the drive. A game launcher updating, cloud sync, antivirus scanning, or a laptop switching power modes can affect the result. Repeat the test with those tasks idle and the charger connected.

How to improve a slow result

1. Close storage-heavy tasks. Pause game downloads, cloud backups, file copies, and large updates. Wait until the laptop is idle, then test again.
2. Use a consistent power mode. On Windows 11, open Settings › System › Power & battery › Power mode and choose a performance-oriented option for a test while plugged in. On macOS, open System Settings › Battery and check that Low Power Mode is off for the comparison, if that setting is available on your Mac.
3. Check available storage space. On Windows 11, open Settings › System › Storage. On macOS, open System Settings › General › Storage. If the drive is nearly full, remove or move files you no longer need, then repeat the test. Keep a backup before deleting important data.
4. Let the laptop cool and breathe. Set it on a hard surface, clear objects from around the vents, and avoid testing while a game is running. If performance improves after cooling, heat may be part of the slowdown.
5. Restart and retest. A restart can stop a stuck update or background task from using the drive. After signing in, wait for startup activity to settle before running the test.
6. Check for a repeated pattern. If the write speed remains unusually low in repeated tests, compare it with everyday file transfers and look for other symptoms, such as freezes, errors, or files taking unusually long to save.

When it may be a drive problem

Consider getting the storage checked if slow saves continue after a restart, the laptop has enough free space, and the test stays consistently poor under cool, idle conditions. Freezing during file access, repeated read or write errors, or files disappearing are stronger reasons to back up your important data promptly and seek help.

A browser test measures storage behavior using temporary data. It does not inspect the drive's health, confirm its exact model, or prove that a component has failed. If the laptop has an older hard drive, its performance may be much lower than a solid-state drive even when it is working normally. For persistent symptoms, check the manufacturer's diagnostics or ask a repair shop to assess the drive before replacing parts.

Why the test can differ from a game installation

The Storage Test measures browser-based storage activity, not a complete game install or a copy from one physical drive to another. A real installation may also depend on downloads, file decompression, antivirus scanning, and the destination drive. The test uses temporary data rather than overwriting your personal files, so treat its result as a useful comparison between runs, not a guarantee of how every file transfer will perform.