Here's the USB OTG adapter >> Rakuten.com - Genica USB Data Transfer Adapter - Type B Male Micro USB - Type A Female USB
With the file system change of 4.2.2 the location of clockworkmod/backup is no longer available from the PC. So I save all my nandroid backups to USB OTG.
My windows 8 PC shows the HTC one as a portable music player. I have no problems copying files to and from the phone's sdcard. Problem is this is in a new location and no longer in data/media it's now data/media/0.
upgrading to 4.2.2 is very confusing for a lot of people because of this file system change. From the PC it seems all you stuff is lost, when in fact the PC just loads a different folder (data/media/0) and the old folder ( data/media) is no longer accessible from PC