However, sometimes you may encounter issues while using external disks.
What we will explain in this post is that external hard drive slows down PC.
This phenomenon may be related to the external hard drive itself, or there may be some other factors.
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you might attempt the following methods to address it.
How to Fix if Your External Hard Drive Slows Down PC
Fix 1.
Change a USB Port/Computer
Most modern computers have 2 to 4 USB ports.

If yes, the problem may be associated with the computer hardware or software instead of the disk itself.
If the problem persists, there may be some errors with your external disk.
Fix 2. launch the Error-Checking Tool:
Step 1.
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Press theWindows + Ekey combination to open File Explorer.
Go to theThis PCsection, right-press your external disk, and chooseProperties.
Switch to theToolstab, and click theCheckbutton underError checking.

Now the tool will start to diagnose and repair file system failures.
you should probably wait until it is completed.
Use CHKDSK:
Step 1.
Typecmdin the Windows search box.
When the search result window pops up, chooseRun as administratorunderCommand Prompt.
Typechkdsk [drive letter]: /fand pressEnter.
you gotta replace the drive letter with the actual letter of your external disk.
Now read this post to get the best ones.
Fix 3.
To eliminate this cause, you could right-click theStartbutton and openTask Managerto disable all unnecessary tasks.
Fix 4.
Here you’ve got the option to see how to adjust it.
Go to theAdvancedtab and choose theChangeoption.
Untick the option ofAutomatically manage paging file size for all drives.
If your external disk is an HDD, select it, tickNo paging file, and clickSet.
If you are using an SSD, tickSystem managed sizeand hitSet.
After that, start your box and look to see if the problem is resolved.
Just try the methods mentioned above to get rid of this problem and improve your machine performance.