Ums Enabler (universal) 〈Web〉

: If a user improperly disconnects the device or if both the phone and PC attempt to write to the same sector simultaneously (the exact problem MTP was designed to prevent), it can lead to file system corruption.

Because the app modifies low-level system behavior, it comes with specific caveats: UMS Enabler (Universal)

: Google transitioned to MTP to solve a major limitation: exclusive access. Under UMS, the phone couldn't access its own storage while plugged into a PC. MTP allows both the device and the computer to see the file system simultaneously by treating the phone as a "media device" rather than a raw drive. What UMS Enabler Does : If a user improperly disconnects the device