IT IS ADVISABLE TO TAKE A BACK UP OF YOUR COMPANY FILES ON A REGULAR BASIS, TO AN EXTERNAL DRIVE.
THE BACK UP IS A PRECAUTIONARY MEASURE IN CASE ANY DAMAGE OCCURS TO YOUR COMPUTER OR TO RESTORE THE COMPANY TO A PREVIOUS POSITION PRIOR TO THE ENTRY OF SUBSEQUENT TRANSACTIONS.
TO RESTORE A BACK UP PREVIOUSLY TAKEN:
FILE > RESTORE COMPANY
Select the location of the back up you are restoring
The company named backup will appear in the third box
Restore - click Restore to complete the restoration of the backup.