https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155993#M328773 I have two Sony 4GB USB and they are of the same model. I connect one of them to my xperia sp via a USB otg cable and it can be successfully recognized. However， when i connect another USB to my sp，the phone was unable to recognize。I have checked both of them on my PC and they function normally. Anyone knows what's wrong? Thank you Mon, 06 Jan 2014 17:50:04 GMT itsykw 2014-01-06T17:50:04Z https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155993#M328773 I have two Sony 4GB USB and they are of the same model. I connect one of them to my xperia sp via a USB otg cable and it can be successfully recognized. However， when i connect another USB to my sp，the phone was unable to recognize。I have checked both of them on my PC and they function normally. Anyone knows what's wrong? Thank you Mon, 06 Jan 2014 17:50:04 GMT https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155993#M328773 itsykw 2014-01-06T17:50:04Z https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155994#M328774 I think your unrecognized usbs file system is differentto other so you must check them o pc.one of them file system can be FAT other can be NTFS.if the problem is this,you must recovery and change file system of other one Mon, 06 Jan 2014 18:02:34 GMT https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155994#M328774 mehmetz 2014-01-06T18:02:34Z https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155995#M328775 @mehmetz I have checked both of them again on my PC and they are both having FAT32 as its file system so i am now frustrated by this Mon, 06 Jan 2014 18:54:32 GMT https://community.sony.com.mk/t5/xperia-archive/usb-otg-problem/m-p/3155995#M328775 itsykw 2014-01-06T18:54:32Z