... design *SD/MS/M2/TF Card Reader + 3 x USB HUB) Connection Kit *Compliant to the latest high speed memory cards, speeding ... *Supports:SD(HC),SD(XC),Mini SD,MMC,MMC 4.0,MS,MS Pro,MS Duo,MS Pro Duo,MS ... PC. 3. Please make sure the switch is for USB or for SD. 4. The photos must save at "DCIM" folder. ... 3.22 support 100mA current , but the 4.2 only 20mA current. your usb or SD card current is overload 20mA, ...