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Very low OTG transferring speed - is my unit faulty?

michal_pado
Star III
Can someone with an OTG hard-drive check what speed they get when transferring files?

When I transfer files from my portable hard-drive via USB to my old budget Xiaomi Mi 9T, I get stable 30-32 MBps speed:

But when I copy the same file to my Zenfone 8, the speed is fluctuating between 2 MBps and 15 MBps:

The speed is fine when copying files directly from my laptop.
2 REPLIES 2

jfgt7j8qgx
Rising Star II
Because it runs on usb 2.0.
Not your faulty, all Zenfone are the same

me_0mby8
Star III
Xiaomi Mi 9T also has usb 2.0 as per gsmarena.