High Capacity External HDDs Not Getting Recognized
Nov 19, 2015
I recently upgraded my desktop from Windows XP Pro to Windows 10 Pro but have had no luck yet accessing the data on either of my two external HDDs even though my system is fully updated with Threshold 2.
The external HDDs are as follows:
WD My Book 1TB (USB 2.0) NTFS
Hitatchi Touro Desk Pro 2TB (USB 3.0) NTFS
Neither appear in File Explorer but they are correctly identified in Devices and Printers. They also appear in Disk Management but are listed as “unknown” and “not initialised”. I get an I/O device error if try to initialize them using MBR or a “disk is not convertible because the size is less the minimum size for GPT disks” error message if I choose GPT.
I have also tried plugging the external HDDs into different USB ports (both 2.0 and 3.0) and re-installing the "USB Attached SCSI (UAS) Mass Storage Device" driver in Device Manager but all to no avail.
I know both my external HDDs still work fine as they were recognized and readable when I tried them on a different Windows 7 machine. I am also fairly confident that the Windows 10 installation is OK on my target PC as I did a clean install from a bootable ISO file.
I read somewhere that Windows 10 may have an issue with external HDDs over a certain capacity, and sure enough, when I hooked up an aged 250MB external HDD it worked straight away, no problem.how I can get Windows 10 to recognize external HDDs with a higher capacity?
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