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How to Solve the Problem of Hard Drive Very Slow Suddenly

Posted on Jan 08, 2018 by Jean to Partition Manager

Do you know how to solve the problem of hard drive very slow suddenly? Here, you can fix a slow hard drive or USB external hard drive easily by three solutions without worrying about data being corrupted or inaccessible.

Hard drive is very slow suddenly

"Is it normal to see my LaCie external hard drive becoming very slow suddenly? Especially this afternoon when I tried to copy some large files to it, I noticed that the speed of the transfer was almost 0.5MB/s... It's not about the slow internet, which I am so sure. Perhaps it's because the hard drive is too old to function well. Do I have to replace the hard drive? But I'm still looking for some better advice to prolong the lifespan of this slow external hard drive."

How to solve the problem of hard drive very slow suddenly?

For your information, factors of viruses, bad sectors, bad track and corrupted master boot record on an HDD or USB external hard drive would result in its decreasing performance. There are many ways to determine in which way your hard drive becomes slow down. Here on this page, we provided the most helpful hard drive test and repair solutions for you, which are divided into two parts: quick fixes and advanced fixes.

Part 1. Quick fixes

The quick fixes we put in the beginning do not require much time and skills, so we suggest you take a glance and give a try if you haven't tried any of the methods yet.

Method 1. Check and remove virus from the hard drive

You can ask help from the built-in Windows Defender or some reputable third-party antivirus software (i.e. McAfee, Symantec, Kaspersky, Avast...) to scan hard drive viruses, or simply try to remove virus without using antivirus software, instead, using cmd.

  • Run the Windows Command Prompt with the Admin privilege.
  • Type the command: attrib g:*.* /d /s -h -r -s and hit Enter. (Replace the drive letter g with your own external hard drive's drive letter.)

Method 2. Switch the SATA data cable

The other quick solution to fix a slow hard drive, especially for the hard drive that fails in a fast file transfer speed, is to disconnect the SATA data cable from the first SATA port on the motherboard (where it was always connected) and then connect that same cable into the last SATA port. Sometimes, it's the problem of a dusty or loose SATA cable that slows down your SATA HDD without warning.

Part 2. Advanced fixes

For some serious hard drive issues that might cause a hard drive overloaded and sluggish, you need the advanced help of professional hard drive diagnostic toolkits! Here, EaseUS Partition Master Free is recommended. This free partition manager comes with three useful features that happen to solve the problem of a slow hard drive perfectly, which are called Disk Cleanup and Optimization, Check Partition and Format Partition.

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 Windows 10 is supported

How to speed up the slow hard drive by the help of EaseUS Partition Master?

Step 1. Launch EaseUS Partition Master Free once it has been installed on your PC.

Step 2. Right-click on the hard drive that becomes very slow suddenly and choose "Check Partition" from the drop-down list.

choose check partition

Step 3. Tick all the three checkboxes which are "Check Partition Properties, Call Windows Chkdsk to fix errors if found errors and Surface Test". Click "OK".

tick the three options to check partition

Step 4. Let the software automatically check and repair hard drive issues that slow down your hard drive. Do not interrupt the process until it finished.

Step 5. Go back to the software's main menu and start the second round. This time click "Cleanup and Optimization" on the top.

choose cleanup and optimization

Step 6. Go on with the option "Disk Optimization".

choose disk optimization

Step 7. Choose the slow hard drive you decided to fix and click "Optimize". Repeat this step if there is more than one partition you are trying to optimize. The software will defrag the hard drive in order to make it work faster again.

click optimize to fix the slow hard drive

Basically, by removing hard drive bad sectors and optimizing the hard drive should revive the failing hard drive that becomes incredibly slow and slow. Otherwise, you have to apply a quick format with the software's format partition features, or even a low-level format to make a final effort.

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 Windows 10 is supported