In USB tool, it provides three USB connection modes:
Inside Mass Storage mode that means the client can visit the inner storage directly (no need to connect via windows mobile device center);
SD card Mass Storage mode, the client can browse the SD card directly;
When we select RNDIS mode, we can visit the inner memory and storage card at same time.
For OTG function, it needs an OTG cable to connect the outer disk to Handheld GPS, then we can browse the file and data inside the disk. And it also supports USB charging.
