It is
NOT a good idea to place any data in your C:/ root directory of C drive. Windows with its TEMP files will fracture the disc volume. Thus, if you create a D: drive Windows will not fracture that volume. If you use C: drive, then you must run
Defrag often, like every time before you import any songs. If not your performance will suffer with Hoster playback, and you may get underruns (studdering and audio dropouts) while playing. This is a computer controlled problem that Hoster cannot overcome.
In closing, it is a very BAD idea to use C drive for your imported files. Create and use a D, E, etc. drive... anything but C where Windows is installed. 