You should back up (make copies) of your AssetManager Pro data regularly.

Back up is the copying of computer files to some form of storage device. If you have a relatively small data file, you can simply copy the AssetManager Pro file (*.dat) to a separate disk. Otherwise you can use AssetManager Pro's automatic backup to create a compressed version of your data file (with a*.zip extension). 

CAUTION : One disaster can erase all your records Don't store your backups on the same hard drive as AssetManager Pro – a single disaster can wipe out all of your records. 

Why is backing up so important? Sometimes disks can become corrupted without your knowledge. Making multiple copies gives you a greater degree of protection. 
Why make multiple backups? Sometimes disks fail in subtle ways. A failure can corrupt a big chunk of your data in such a way that you may not notice it during a session. Once you copy the damaged data onto your only backup, you're stuck; you will have no valid backup and will need to re-create your data file. Multiple backups give you a greater degree of protection. 
When to back up your data file? We recommend:

Daily backups – rotational

If you use AssetManager Pro every day, make a backup disk for each day of the week. Use for example, your Monday backup disk after Monday's session, Tuesday's backup disk after Tuesday's session, etc.

Monthly backups – archival

After completing all entries for a month, make an archive copy. For example, when you finish making entries for February (which is usually sometime in March), make a backup copy. Label it 'AssetManager Pro February 2016 Archive'. Put it in a safe place, preferably in a different location to wher e your computer is located. Do not use this disk again.

Yearly backups – archival

After completing all entries for a year make an archive copy. For example, when you finish making entries for 2015/2016 (which is usually sometime in 2016), make a backup copy. Label it 'AssetManager Pro 2015-16 Yearly Archive'. Put it in a safe place, preferably in a different location to where your computer is located. Do not use this disk again. 

To back up your data file

1 Go to the File menu and choose Backup. The Save As dialog box appears. 

 
The Save As dialog box also appears if, while exiting AssetManager Pro, you clicked Yes in the
Back Up MYOB Data File dialog box. 

 
2 Click the Save in drop-down list to select the required drive. Navigate to and select the folder in which the backup will be stored.

3 Name the backup file. A suggested name for the backup file will appear in the File name field. Change this to the suggested name mentioned above. Make sure the file is saved with the extension .zip.

4 Click Save.

AssetManager Pro creates a backup of the data file you're currently using, and compresses it to a smaller, more manageable size. You may get a message saying that file exists. Make sure you are not overwriting another backup you want to keep.

5 Label all your backups with enough information to tell you when they were done and where you were up to in data entry. For example 'Tuesday, 3 April 2016' or 'Backup, 3 April 2016'.