script for network servers?

I want to write a script that will find all items in folder X:\userbackup ? on SERVERBACKUP and all items in main\FileServer\marketing and compare those 2 folders for any missing stuff and if there are some changes – I want from that script to send a MESSAGE ERROR to me.
How to start that script? Can I write script that will automatically connect to the drive on the network? Like for example:
1) it will connect to drive X:\userbackup and record in .txt file what items are in that folder
2) it will connect to \main\filerserver\marketing and record in .txt file what items are in that folder
3) compare those 2 txt file and if file from X:\userbackup is missing something or if txt from ?\fileserver has something that txt from ?user backup does not have then send error message