PST Once Imported?

I want to confirm, before purchasing, how eM Client handles PST files. I know that I can import and have done so already. Some questions

  1. Now that the data is imported, is it still in the original PST file or is the data stored somewhere else [so I can ensure backups]
  2. Is there a way to take this data back out to a PST if I would ever need to for some reason? 

once you import the PST file it will convert it to a .eml file and you should still have your PST file.  if you want to export or backup your messages they will create a .eml file.  there is not a way that I know of to export your messages as a PST file once it is imported into em client.