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I'm trying to install Windows 8.1 Pro to a USB hard disk and I get the following error message when selecting the disk in WinToUSB:

Sector size not supported. (0x057800C103900000)

Here is my user.log: http://pastebin.com/03FP7X4Z
WinToUSB only supports USB disk devices with a sector size of 512 bytes, but your USB hard disk has a sector size of 4096 bytes, please try another USB drive.
(07-27-2014, 11:45 PM)admin Wrote: [ -> ]WinToUSB only supports USB disk devices with a sector size of 512 bytes, but your USB hard disk has a sector size of 4096 bytes, please try another USB drive.

I have the same problem. I have a 3TB USB HDD. My USB HDD's minimum sector size for NTFS is 4096 bytes. I can't reduce from 4096 bytes to 512 bytes. Could you add 4096 bytes support for WinToUSB software, please. This issue is an important issue.
Thank you for your advice, I will do it.
(03-31-2015, 10:10 PM)admin Wrote: [ -> ]Thank you for your advice, I will do it.

I'm getting an error message, "Sector size not supported. (0x000000C106560000). Is this a 4096 size sector or some other size? Has the software been modified to work with 4096 sectors?
(06-15-2016, 03:41 AM)dale Wrote: [ -> ]
(03-31-2015, 10:10 PM)admin Wrote: [ -> ]Thank you for your advice, I will do it.

I'm getting an error message, "Sector size not supported. (0x000000C106560000). Is this a 4096 size sector or some other size? Has the software been modified to work with 4096 sectors?

Yes, it is a 4K size sector USB drive and WinToUSB doesn't yet support it, so please try another USB drive.