Problem : You have accidentally deleted a file or a list item that you need.
Solution : SharePoint has a built-in Recycle Bin functionality that allows you to retract deletions that you might have mistakenly made.
Files and items that were
deleted are kept in this Recycle Bin for 30 days, after which they are
moved to the administrator Recycle Bin. So if you don’t see the file or
list item that you have deleted in the past, ask your administrator to
recover it for you.
To restore a file,
click the Recycle Bin link in the left navigation bar. Clicking this
link opens the Recycle Bin page, which shows all the files and list
items you have deleted in that specific site (see Figure 1).
In the deleted items table,
you can see the name of the deleted item or file, the original location
(site and document library or list and folder), and other data on the
file or item, such as who created it in the first place, when it was
deleted, and (for files) what size it was.
To restore one or more
files and items, select the check box next to the items you want to
restore and click Restore Selection. The item or file is restored with
all its versions and properties.
You can also delete the item or file from the Recycle Bin by selecting Delete Selection.