The RAVPower RP-WD03 FileHub is 6000 mAh power bank, portable router, disk/card reader and a media streamer in one pocket sized device. 1)Supporting USB hard drives up to 4TB and SD/SDHC/SDXC cards up to 256GB, the FileHub allows you to save important documents and files from your Android or iOS devices. 2) Perfect for when you need to free up space. 3)Up to 5 mobile devices can connect simultaneously allowing you to stream media from the SD or USB drives, or you can directly share files between two different storage devices. 4) As a portable router, you can turn any wired network and make it wireless, or connect it via a DSL or cable modem and it will act as a regular router. 5) Act as WiFi extender, If you connect it to an existing Wi-Fi network, you can share hotspot access with all your friends and families - perfect for hotels or places you each need to pay for internet access.Please note: 1) Due to the limitation of the Apple iOS system, you can ONLY access the Photos folder on your iPad/iPhone;Filehub is currently unable to sync with media files stored in iTunes to USB storage devices due to digital rights management (DRM). 2) Does not work with Mac formatted hard drive. We also provide a good resolution for you to "expand" the limited space of your smartphones and tablets. Four choices for you as below: 1.) HooToo USB 3.0 flash drive with lighting connector (iOS OTG drive, 32GB, 64GB) - HT-IM001/002 2.) Travel router and wireless streaming device (Android/iOS support) - TripMate Nano (HT-TM02) 3.) Travel router, power bank, wireless streaming device (Android/iOS support)- TripMate Titan/ Elite (HT-TM05/06/01) 4.) SD card USB reader, travel router, file manager, wireless streaming media, (Android/iOS support)- RAVPower Filehub (RP-WD01/WD02/WD03) And you can plug HooToo flash drive to USB port on Tripmate and RAVPower Filehub to work perfectly together.