My USB 3.0 external drive had a similar issue... when copying large files from the external device - I would get 80-100MB pr sec.... on a 4GB file it would get about 2/3 of the way through then the speed would start dropping.... 70MB per sec ...then 50 MB per sec.... then 10 MB per sec.... then 1MB ...then 500KB/s.... then stop. After a while it would then tell me it couldn't read from the source (!@@!#!@#)
After trying all the tricks (win10) - with no luck.
for reference they were (if you want to try them, google for more detailed info on each)
- updating the PC BIOS firmware
- changing the HDD policy in Device Manager (for speed)
- turning off USB suspend in Windows Power settings
- turning off power suspend for the USB hub in device manager
- reverting to the USB 2.0 ports
- running check disc
- checking the Filesystem was GPT formatted NTFS (and not FAT32 or anything that limits the size of files)
As it was a Seagate, i tried downloading their free Seagate dash software (used to diagnose and change HDD settings...like turning off the bright LED etc) - I ran the "test" feature on the hdd and ... it failed. It tried this via a USB 3.0 port and a USB 2.0 port. In all cases the test came back as failed.
In frustration, i ripped apart the enclosure of the external seagate HDD and tried it in another 'generic' USB 3.0 enclosure (which required me to reformat the thing)... after initial excitement of it seeming now working! Once it started filling up ...the same issue started appearing more and more...with speed slow downs then the HDD becoming unavailable/ unable to read.
Suspect the HDD has bad sectors or a combination of that and the drive being larger than 2TB. I'm going to try running a more thorough check disk program on it and seeing if i can still get some value by creating a few partitions to isolate the problem .
No data loss (quite lucky), but not covered under warranty due to the age of the drive.
In short - what helped me most was the HDD manufacturer software - which included a test (see WD or Seagate websites for more info) - this will tell you if its worth exploring the other options.
After trying all the tricks (win10) - with no luck.
for reference they were (if you want to try them, google for more detailed info on each)
- updating the PC BIOS firmware
- changing the HDD policy in Device Manager (for speed)
- turning off USB suspend in Windows Power settings
- turning off power suspend for the USB hub in device manager
- reverting to the USB 2.0 ports
- running check disc
- checking the Filesystem was GPT formatted NTFS (and not FAT32 or anything that limits the size of files)
As it was a Seagate, i tried downloading their free Seagate dash software (used to diagnose and change HDD settings...like turning off the bright LED etc) - I ran the "test" feature on the hdd and ... it failed. It tried this via a USB 3.0 port and a USB 2.0 port. In all cases the test came back as failed.
In frustration, i ripped apart the enclosure of the external seagate HDD and tried it in another 'generic' USB 3.0 enclosure (which required me to reformat the thing)... after initial excitement of it seeming now working! Once it started filling up ...the same issue started appearing more and more...with speed slow downs then the HDD becoming unavailable/ unable to read.
Suspect the HDD has bad sectors or a combination of that and the drive being larger than 2TB. I'm going to try running a more thorough check disk program on it and seeing if i can still get some value by creating a few partitions to isolate the problem .
No data loss (quite lucky), but not covered under warranty due to the age of the drive.
In short - what helped me most was the HDD manufacturer software - which included a test (see WD or Seagate websites for more info) - this will tell you if its worth exploring the other options.
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