Ultra Slow! Transfer rate with Ultra Dual Drive Go USB 1TB on MacOS/ExFat

USB Flash Drives Dual Drives
1

Hi there,
Takes about 1h to transfer 818MB from my MacBook (RAM-8GB) to the Ultra Dual Drive 1TB, who becomes very very hot.
Writing/reading speed is correct on my Dell PC notebook & Lenovo Android Tablet. The drives doesn’t get even warm. The problem lies with MacOS.
I bought the USB drive 4 days ago and transferring files from my MacBook takes ages! What’s wrong? the driver? I restarted the MacBook (Sonoma 14.4.1) nothing changes.
Thanks a lot!

1 Like
2

@grincement
Have you checked our knowledge base articles?
(Get Support for Your SSDs and Flash Products | SanDisk)

Try this one.

Have you opened a Support Case?
If not, contact SanDisk Technical Support for assistance.
(Contact Support | SanDisk)

3

Hi, thank you. Yes I checked the knowledge base and didn’t found an explanation for the latency. It seems to be related specifically to this Sandisk Drive. I don’t have this problem with other drives working with exfat system file.

4

It could be a MacOS compatibility issue or power management limiting speeds.

Try formatting the drive to exFAT using Disk Utility and see if that improves transfer times.

5

First, try changing the USB cable to see if the data transfer speed improves.
Next, disable the Spotlight Search indexing function on the external drive.
Additionally, you can use macOS’s built-in tool, Disk Utility (First Aid function), to check for errors on the external drive and repair them.
Finally, consider reformatting the external drive to the macOS-native APFS format to potentially improve transfer speeds. (Also read: [Fixed!]Slow External SSD and HDD on macOS Ventura)