CH376s USB Flashdisk Reader Writer Module U Disk Reader for Arduino CH376S USB Module U Disk Read And Write Module with 8-bit Data Bus Connect MCU/DSP/MCU/MPU Controller with 2x8 Connector USB Write and Read Module 1. The CH376S chip internal curing FAT file system, file operation is simple, fast, 2. Support U disk, USB hard disk, USB flash drive and USB card reader, USB storage device 3. Standard Capacity SD card support, high capacity HC-SD card as well as protocol-compatible MMC, TF card 4. Support a variety of communication interfaces: 8-bit parallel, SPI interface and asynchronous serial 5. Compatibility: Equipment manner compatible with CH372 compatible host with CH375 6. Module size: 50mm 34mm