Initial Release

As indicated in the description of this library, this initial release adds complementary functions to the POSIX storage functions already included in the Renesas core and the Arduino_USBHostMbed5 library, and makes them available to sketches.
The added functions are namely:

• mount to mount a device
• umount to unmount a device
• mkfs to format a device

Additionally initial hotplug support was added for Portenta C33 with the following functions:

• register_hotplug_callback to register a callback for when a device was inserted
• deregister_hotplug_callback to deregister the above mentioned callback