For a good computer data maintenance:

It is necessary to make security copies and maintenance of our data every certain time, for it we have to consider these parameters:

 -Which programs contain information?

Mail programs:

Here what we will do is to export or to copy the files of these programs, for example in Microsoft Office Outlook we will look for in the hard disk files of type "PST" to copy them, and if you use the Outlook express use this link.

Accounting programs:

We will copy all the content of the directories of these programs, also some of them offer the posivilidad to make backup copies by themselves.

Other Programs:

The same as the previous one.

Programs with internal databases:

We will access the control panel and export the databases.

Browser digital certificates or others.

We will access to the control panel and we will export the certificates completely, one by one.
-Where is our generic data?

My documents:

It is simple to copy the entire contents of this folder.

My desktop:

The same as above.

Other locations:

For example units or folders that we have of data created by ourselves:

More of the same.
-What programs can I use for backups?

Good good question, among them we could choose those that come from factory in the equipment, for example in Windows xp we will go to:

HOME "PROGRAMS", "SYSTEM TOOLS", "SYSTEM TOOLS", "BACKUPS".

On the other hand there are professional programs such as VERITAS BACKUP, or ACRONIS TRUE IMAGE.
-Where do I put all the data?

To carry out all this process the ideal thing is to acquire an external unit (another hard disk) that we will buy in Internet, the store of the corner, or any great surface, then we connect the unit to the computer and we will proceed to the security copies. Add that some providers offer us on-line backups, in my opinion they are very slow if we have a lot of data.