I use a Transcend RDP9 card reader/hub to transfer from SD card to a thumb drive. I would assume you could instead plug a second card reader into the hub's USB receptacle. I don't use it with SDXC cards, but the manufacturer claims that they are supported. Check the phone compatibility list, though... some older phones don't have fully-functional OTG support.

I use a Transcend RDP9 card reader/hub to transfer from SD card to a thumb drive. I would assume you could instead plug a second card reader into the hub's USB receptacle. I don't use it with SDXC cards, but the manufacturer claims that they are supported. Check the phone compatibility list, though... some older phones don't have fully-functional OTG support.

UPDATE: I had a chance to actually try plugging my other SD card reader into the USB port on this one, and it worked fine, allowing card-to-card transfer. Of course, YMMV...

I use a Transcend RDP9 to copy to thumb drive, but I would assume you could plug a second card reader instead. I don't use it with SDXC, but it claims to support them. Check the phone compatibility list, though...

I use a Transcend RDP9 card reader/hub to transfer from SD card to a thumb drive. I would assume you could instead plug a second card reader into the hub's USB receptacle. I don't use it with SDXC cards, but the manufacturer claims that they are supported. Check the phone compatibility list, though... some older phones don't have fully-functional OTG support.