[gapan]

Directory support and hierarchical filesystems were only supported after version 2.0. Until then, the experience was identical to CP/M.

Not that it was that much of an important feature at that time either. With the 360KB size of 5.25" drives, there were only so many files you could put in a disk. Support for hard drives was also introduced later, with version 2.0 and if I remember correctly, support for 3.5" 720KB drives came only with MSDOS 3.20.