Fix Slow External Hard Drive on Mac

Jean updated on Dec 11, 2020 to Mac File Recovery | How-to Articles

Is your external hard drive running slow when open or transfer files on Mac? You need to follow tips here to fix slow external hard drive on Mac and improve the slow Mac external hard drive performance, at the same time, protect important data from being corrupted or inaccessible on the slower and slower external hard drive with EaseUS Data Recovery Wizard for Mac.

Help! External hard drive becomes incredibly slow after High Sierra update

"I'm experiencing a very slow external HDD since the High Sierra update on my iMac. As soon as I connect it and want to browse, it freezes a lot, takes an age to load contents and open files. I left it for several hours and reconnect it but it still won't work properly. Now, it warns me that it's inaccessible and needs format."

Are you facing the same issue that the external hard drive becomes very slow suddenly for no reason? To speed up a very slow external hard drive on Mac and improve its performance without losing data, you are arriving at the right place.

Workable Solutions Step-by-step Troubleshooting
Part 1. Recover Data from Slower and Slower External Hard Drive

Step 1. Download EaseUS data recovery software for Mac
Step 2. Choose the external hard drive to scan
Step 3. Preview and recover files...Full steps

Part 2. Fix a Slow External Hard Drive on Mac

Fix 1. Clean up useless duplicated files...Full steps
Fix 2. Repair Disk Utility...Full steps
Fix 3. Activity Monitor lookup...Full steps

How to Recover Data from Slower and Slower External Hard Drive

First of all, you must need a Mac data recovery program to extract data from an inaccessible external hard drive on your Mac after it's getting slower and slower. And, don't format the drive before a complete data recovery if the error message appears and says it needs to be formatted before you can use it.

To safely export data from a slow external hard drive on Mac, download EaseUS Mac drive recovery software and follow the three steps.

Step 1. Select the disk location (it can be an internal HDD/SSD or a removable storage device) where you lost data and files. Click the "Scan" button.

select a location and click scan

Step 2. EaseUS Data Recovery Wizard for Mac will immediately scan your selected disk volume and display the scanning results on the left pane.

start scan on the Mac

Step 3. In the scan results, select the file(s) and click the "Recover Now" button to have them back.

click recover now button to recover lost data on your Mac

How to Fix a Slow External Hard Drive on Mac OS X?

For your information, many factors would affect the performance of an external hard drive on Mac OS X and decrease its speed in file transfer or hard drive loading. The following are some examples.

  • Logic Errors & bad sectors on external drive
  • Large size apps on the external hard drive
  • Duplicate video, pictures and other files on external hard drive
  • Too many apps are running while the drive is in active mode
  • Long time in external hard drive defragmentation
  • The external hard drive is too old

Next, you are going to grasp the unique solutions this page provides and quickly solve the problem of a slow external hard drive on Mac after transferring all your data files to a safe place with EaseUS Data Recovery Wizard for Mac.

Solution 1. Clean up useless duplicated files from Mac external hard drive with Mac cleanup software

Large duplicate files, such as videos, photos and music take a considerable amount of disk space, and the accumulative garbage will make your Mac har drive run slower and slower. So, to increase the external hard drive speed on Mac, the primary action you need to take is to clean up all the duplicate files in order to free up some disk space.

Here, we recommend you EaseUS CleanGenius, the best Mac speedup software for you to deal with a burdensome Mac external hard drive.

Step 1. Launch EaseUS CleanGenius and click on Duplicate Finder;
Drag and drop folders to scan or click Folder icon to add folder for finding duplicate files;

Find duplicate files on Mac

Step 2. Select target folder and click Open so to scan and find duplicate files;

Find Duplicate Files

Step 3. Right-click found file and select View to identify which one is the file that you want to keep;
Select unwanted duplicate files and click Delete to remove from Mac.

Solution 2. Repair Disk Utility to resolve the slow external drive problem

Many users don't know that repairing the Mac Disk Utility would help improve the performance of a slow external hard drive, and it's also worth your try immediately.

Step 1. Press down the Command + S keys to boot your Mac computer into the single-user mode.
Step 2. Type the behind command: fsck -fy
Step 3. After the fsck command, you will receive a message "file-system modified".
Step 4. Now reboot the Mac to continue the repairing process.

Other Mac external hard drive speedup tips

1. Activity Monitor Lookup: Watching and monitoring a close look at the Mac activity monitor can sometimes help in improving the slow running external drive performance.

2. Proper StartUp items management: When you start a Mac, too many icons starts automatically in the Mac OS background. Properly managing the StartUp items can also helpful in improving the slow external drive performance.

3. Visual effects Turning Off: Turning off the visual effects on Mac OS can also useful in improving the performance of an external drive.

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Frequently Asked Questions

1. Why choose EaseUS Data Recovery Wizard?

"EaseUS Data Recovery Wizard is the best we've seen. It's far from perfect, partly because today's advanced disk technology makes data-recovery more difficult than it was with the simpler technology of the past, but it's fast and efficient..."PCMag

"The first thing you'll notice about EaseUS Data Recovery Wizard Pro is that its interface is very clear and uncluttered, with only a small collection of self-explanatory controls. You won't find lots of extra options hidden in a system of hidden menus, either; what you see really is what you get."techradar

"Recover lost files, even after deleting a partition or formatting your drive."Macworld

2. Why cannot I recover 2GB data for free?

It is recommended to check the version installed is Free or Trial because they are different versions.

Trial has data preview function but cannot save any files, while the Free version enables to recover 2 GB files. The default free space is 500 MB and you may share the product on social media to get another 1.5 GB.

3. Why cannot the recovered files be opened?

A file is saved as 2 parts on the storage device: directory info (which is comprised by file name, time stamp and size info, etc.) and data content.

If the files with original file names and folder structures cannot be opened, one possible reason is the corrupted directory info. There is still a chance to recover the data content with the RAW Recovery method in our software.

4. Why isn't it suggested to recover the files back to the original drive?

The storage structure of the lost files would be altered or damaged by any changes on the drive. If you save the recovered files back to the same drive, the original data structures and data content would be corrupted or overwritten, which causes permanent data loss. So you should prepare another disk to save the files.

5. How can I check whether my data is recoverable or not before purchase?

The Free version helps you save 2GB files, so verify the recovery quality of our product before purchase.

6. How long does it take to scan the drive?

It strongly depends on the capacity of your hard drive and the performance of your computer. As reference,most drive recoveries can be completed in around 10 to 12 hours for a 1-TB healthy hard drive in general conditions.

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