With this Micro USB Host OTG cable, you can access to most of USB Flash Drive, Mouse, Keyboard and etc. It should work with most USB Flash Drive, Mouse and Keyboard, but please note that some of them may not be compatible, As it depends on the driver database of Device whether it would have or not the same. There is not time lag of playing a movie file on my USB Flash Drive and it can be played directly with this USB Host Cable It also work with external hard-disk, BUT It need external power source for the hard-disk It also work with non-power card reader. No SETUP required. Just plug and play! Please note : The cable is suitable for many low power USB devices like Pen Drives, Card Readers, Digital Cameras, USB Keyboards and Mouse etc but some USB Devices such as External Hard Disks, Controllers, some optical mouse, keyboards etc. may require more power than can be supplied by your phone. In such cases, you may need to connect a powered USB Hub to the phone with this OTG cable and then connect such devices to that HUB.