Well, providing the screen is unlocked as I connect its lead to the PC, it offers Charging Only, or USB drive. Certainly, the drive reveals the folders on the SD card, and I can create a folder for, as mentioned, a backup of me book. But, no means of a contact list it seems.
Odd about the list disappearing, only remembered that after hitting the sack last night. But I may have stripped the SIM at that time, though it gives 3 stages of warning before final erasure. It's a puzzlement.