Q：The portable storage device failed to connect to the phone via OTG cable.
A：1. Please confirm whether your phone supports OTG functionality. OTG requires hardware support, and not all Android models support OTG by default.
2. Please confirm whether the connected microSD card is formatted as FAT32 and whether it exceeds the maximum SD card capacity supported by your phone.
3. When the OTG cable is connected to a USB storage device, the phone provides power to the USB storage device. This may prevent the phone from recognizing USB hard drives, which consume relatively more power.
