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How to Solve the Problem of Hard Drive Suddenly Very Slow

Updated on Dec 10, 2018 by Jean to Partition Manager

Summary:
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 Suddenly Very Slow 

"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...I am so sure it's not about the slow internet. 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 

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 the 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 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 a problem of a dusty or loose SATA cable that slows down your SATA HDD without warning.

Part 2. Advanced Solutions

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 correctly, 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

Check partition

 

Step 1: Open EaseUS Partition Master on your computer. Then locate the disk, right-click the partition you want to check, and choose "Check File System".

Check Partition - Step 1

Step 2: In the Check File System window, keep the "Try to fix errors if found" option selected and click "Start".

Check Partition - Step 2

Step 3: The software will begin checking your partition file system on your disk. When it has completed, click "Finish".

Check Partition - Step 3

Cleanup and optimization

 

Step 1: Install and launch EaseUS Partition Master. Select "Tools" and click "System Optimization".

choose system optimization

Step 2: Choose "Disk Optimization" to optimize your hard disk and improve the disk performance.

select disk optimizayion

Step 3: Select the partition that you want to optimize and click "Optimize". After a while, the defragment is completed. The time depends on the amount of the fragments on this partition.

optimize the disk

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