Improvement: put the data folder into a file container (VHD)

Some operating systems does really bad in copying/moving a large number of small files. So using file containers (such as a virtual hard disk) can improve the performance when you want to move your data folder into another disk or partition.

No files, tests, or entry points are identified. First trace how ZeroNet chooses and moves its data folder, then investigate which operating systems and virtual-disk formats are supported. Done would require a defined container workflow and performance improvement, but the issue does not specify acceptance criteria.

Written by the indexing model from the issue text.