I have never seen something called ESP like you describe, but Google has a lot of info on it. I suspect Windows remapped your BIAB drive to another letter. Perhaps you had another USB device plugged in?

Try using MyComputer or This PC to find the drive that is BIAB and look up how to reassign it a new drive letter, and pick one that is higher so it won’t get preempted. I use letter M for my drive. Then you will have to go into Preferences RealTracks and change the location (and do the same for RealDrums).


BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors