USB MSD using the AHBSRAM banks 0 and 1 to create a 32k RAM disk. After FAT format 12kb is writable

Dependencies:   USBDevice USBMSD_RAM mbed

Fork of USB-MSD_SD_HelloWorld_Mbed-RAMVersion by avnish aggarwal

USBMSD_SD.lib@92a4e3cf24db: not found in manifest