Ext HDD very slow....

[Alex6969]

Hi, I have two identical Buffalo ext hdd, one of them today started to be verrrry slow, writing a 50k data took 25mins.
I tested the hdd on another laptop, with no problem. It must be something with the hdd and my macbook pro running monterey. But the other hdd on the same macboo pro is fine.
Any idea how to fix this?
I noticed that when the drive is connected, the icon also appears under network on Finder, also takes lonftime to load and eject.

 

[Fishrrman]

What format is the [slow] drive in?
HFS+?
APFS?
Something else?

Is this a USB3 drive?
Using a connecting cable that has a "blue" tip?
If so -- I know this may sound illogical, but...
... do you have a USB2 connecting cable around?
One that has a "white" tip?
What happens if you try that?

 

[Alex6969]

NTFS
I don't have spare cable, but the cable is fine as it has been working properly, also tried it another laptop without any problem.

 

[Fishrrman]

"NTFS"
^^^^^^^^^
This could be your problem.

For a Mac drive, used to store Mac data, you want a "Mac format".
Either HFS+ or APFS.
If it's a platter-based hard drive, HFS+ is best.

I would:
- take the drive to another computer with which it works.
- copy any data off the drive that you wish to save
- take the drive back to the Mac and erase it to HFS+ or APFS.
- check it with a benchmark utility. Does it now "run as it should run"? If so...
- if the data was copied to a PC, DO NOT take this drive back to the PC.
- instead, use ANOTHER drive to "gather up" data from the PC you want to restore. Take that drive to the Mac, and copy the data over on the Mac.

 

[ian87w]

Something is not right here. By default, macOS cannot write on an NTFS drive.

 

[DeltaMac]

It could be helpful to run the terminal command "diskutil list" with one drive attached, then the other, just to see if there is some difference in how your Mac "sees" the drives.

 

[Alex6969]

I have used NTFS for years, so I can use the data on windows and mac, on mac I use Tuxera software to read and write.
I have another buffalo ext hdd, use it exactly the same.