One of the most asked questions concerning SharePoint is backup and
recovery. One step further is restoring individual files that users
have deleted off the site.
Here is a list of backup/restore options for individual documents:
– “Add a Recycle Bin to Windows SharePoint Services for Easy Document
Recovery” from MSDN
– “DocAve
Backup for Microsoft Office SharePoint Products and Technologies”
Alternatives:
– from Mart
Muller's Weblog using .fwp files created by smigrate (I have not
tested this!)
– from Bryant
Likes' Blog inserting a trigger and new table into the SQL
database (Microsoft may not support you after doing this! So be
warned!)