USB write speed suddenly unusable

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I have a tablet-PC that has trouble writing backup image files to USB thumb drives. The files are large (16gb) Every few times I write to it the speed drops from 66 mb/s to 1 mb/s.  I contacted ASUS and Lexar and followed their suggestions but no change. Only workaround I found in forums is uninstalling the (first two) USB drivers in “Device Manager”. When the second is uninstalled, the touchpad stops working so I use the touch screen to reboot. Then it writes at 66 mb/s for one or two transfers before I have to do this again. Problem started about a year ago so I suspect a Win10 update may be the cause…

ASUS Transformer Mini T102HA-RH01-C
Lexar Jumpdrive USB 3.0 128gb (exFat format, Better Performance setting)
Lexar Jumpdrive S45 USB 3.0 128gb same settings

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Only problems I’ve seen with USB Thumb drives include the standard Windows issue of not being able to format over 32GB as FAT32 and that sometimes the “fall-back” of USB 3 to USB 2 does not always work.  To test the USB ports I use different types of drives, most common is a USB 2 750GB WE Passport, seems to always work where others don’t.  It is quite possible to reformat 64GB and larger drives as FAT32 using a version of Linux [installed, LiveDVD or Bootable USB] that includes GPARTED or the bootable GPARTED LiveCD to do so, I’ve done up to 500GB hard drives.

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What is the date and manufacturer of the USB device driver software? Maybe Windows updated to a newer / less good driver. Maybe there’s a later / better driver.

cheers, Paul

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Intel USB 3.0 eXtensible Host Controller 1.0 (Microsoft)
18/09/14  Version 10.0.17763.1
Generic USB Hub  (same date/version)

The processor is an Intel Atom x5-Z8350.

Asus Windows is smaller (36 gb image 15 gb) than an HP laptop (53 gb image 24 gb).
Both running Win 10 Home 64-bit v. 1809 b. 17763.437
The Asus has a USB 3.0 port – HP has 2.0 which writes fine to all thumb drives.

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Berton wrote:

It is quite possible to reformat 64GB and larger drives as FAT32 using a version of Linux [installed, LiveDVD or Bootable USB] that includes GPARTED or the bootable GPARTED LiveCD to do so, I’ve done up to 500GB hard drives.

Do you mean formatting with different software would work better for USB 3? Would FAT32 be more reliable? I recall reformatting to extFAT because it would write large files and my backup software Macrium Reflect Free could restore an image from it. It couldn’t even see my old external USB drive or a network drive – maybe I should find better imaging software that can restore from these…

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geek wrote:

Problem started about a year ago so I suspect a Win10 update may be the cause…

ASUS Transformer Mini T102HA-RH01-C

Hm, that’s a Cherry Trail CPU at least. What version of Windows 10 exactly are you running?

Yes, Intel Atom platform device drivers have been a constant problem, but I was hoping Cherry Trail would’ve been at least somewhat better. Been avoiding those too anyway…

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