Could you please provide backup up as of date 3/2/16
I need instructions on how to restore in another.
2. Reason for this exercise : Need to find out list of Tickets for which attachments are updated / deleted in
There are some problems here.
You could still raise this with support, but the best you will get from them is the backup from that date. You'll need to restore it on your own dev system, work out how to hack the data to prevent the project overwrite, export it and re-import it. I don't think that's really particularly useful - I'd get the dev system working and then just compare it with production. Or just read the database for "changeitem" which will contain records of attachment updates and deletes.
If you do want to try this, then raise it at https://support.atlassian.com
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