I have tried wad manger v1.3 and channel file manager v2.0 beta2 . I used a geek squad 2 gig thumb stick and formatted it as fat. Wad manger couldnt see the files on the drive , when retieving it say ERROR (ret = -1) I then tried channel file manager... That could atleast see the files but when I would install a file it would start to install then it would come back to me with a ERROR (ret = -1) . So i decided to copy the wad to the sd card , it installed with no problems. So I know the wad is good , but I also know the thumb drive is good. I tried reformatting the usb drive with fat , again same problems... I just now came up with the idea to reformat again except this time I formatted with fat32 ...To my surprise channel file manager was able to install the wads located on the usb drive sadly wad manger still gave the same error I also tested the speed of installation channel file manger seems to be faster over all....but installing from the usb seemed a little slow , for reasons i'm not sure. I installed the same file from both usb and sd the usb took atleast a minute if not more , the sd took only about 20 seconds. I hope you find this helpful.