How many threads for reading and writing to the hard disk?

Question

i am developing an application that gathers a list with all the files of the hard drive and also afterwards it does write files to the hard drive.

I want to ask : what i

Answer 1

I would say one thread is enough. The CPU might be able to run many threads, but the speed of the hard drive is many orders of magnitude below the CPU's. Even if running more threads made the requests for I/O faster (of which I'm not certain), it wouldn't make the hard drive actually read faster. It could probably even slow it down.