save/copy/backup in SL (clarification re: maingrid rollback (..))

In response to problem of customer who, thanks to sim rollback, lost thousands of L$ worth in wares they purchased and placed in the sim, we are being told that:

"To prevent such events in the future, I would recommend that you save/copy/backup your work as you would with any computer application.

Consider going to some of the vendors you made your purchases from and explain what happened. Many vendors are willing to replace items lost. And in the future, make backup copies of any items you care about preserving."

( /139/8b/148060/1.html )

Could i receive more detailed explanation just how exactly one "saves/copies/backs up" their work created with items set by the sellers to no copy/transfer, and how exactly can one prove to the vendors that such transfer-enabled items weren't passed to another person, but were in fact swallowed without trace by a rollback of sim to its previous state?

After all, if SL is "like any other computer application" and am being told to save/copy/back up my work, then i expect being able to do exactly that. Unfortunately, i cannot on my own figure out the way to do it with items that are set to 'no copy', but am hoping Claudia can follow up with at least as helpful clarification as the original advice she gave there...

If your object is set to No Copy, then clearly you will not be able to make a backup. At this point, it has been suggested that you contact the creator of the object. There isn't always a means to conclusively prove you've lost something, but in my experience MANY content creators understand that SL can sometimes be an unforgiving environment for your inventory and as such choose to replace things gone missing if you're polite about it. Obviously you'd not be able to convince them that you've lost the same item repeatedly, so don't plan on using this as a ruse to stock your store ;p

Where it is possible to do so, make backups of your work. It pays to remember the first rule of computing..."Save or Suffer".