Since you are using a Hard Drive, ignore the "Auto-Run/Auto-Play" point.
MTUSUPPORT and I posted normal times for importing. ZIP or MP3+G doesn't matter; they convert at roughly the same speed. Hoster has an "unzip" tool built in.
It doesn't matter what the filenames are to my knowledge as to the conversion speed.
You need to read the Manual about the "Define field order" fields, and BATCH importing, then you will understand how this complex operation works.
When bad files are found during import, their path/name is written to a log .txt file where you can later open and test or unzip/rezip each.
WinRAR costs $29. It can batch unzip and rezip the contents in a a folder. Since Hoster's Import Hard Drive Files screen creates a .txt log file of found bad files, you could move these to a different folder, then use WinRAR to convert them from MAX compression to a standard ZIP compression that Hoster will import.