: In the car community, "NBT" stands for Next Big Thing , a specific generation of BMW's iDrive infotainment system. The .rar file might contain firmware, maps, or coding scripts.
The text is likely a filename for a compressed WinRAR archive containing data related to a software project or mod. NBT.rar
To access the "solid text" or data inside, you need an extraction tool: : In the car community, "NBT" stands for