how create a second Partition for my files

You need to remove one of the existing partitions to create a new one.  Before you do, make sure you make a backup disc in case a reload is necessary.  Once you change the partition structure, the quick restore will no longer function.

how many partitions came with the laptop?

There are at least three - and remember, anything you do renders the restore partition useless, so it can be deleted.

The restore partition will be useless once you alter the partition table.

what "...it can be deleted."?

restore partition, OS win7 partition, your files storage partition,  that you mean?

There's another hidden partition with the Dell Diagnostics - making four, probably all primary.  You can, if you want, delete the file storage partition and create a new one - this time make it an extended partition, in which you can then create two logical drives.

Windows supports only for total primary partitions.

Now exist: restore partition, OS win7 partition & my files storage partition,  that you mean?

The easiest way is probably to use EaseUS partition Manager as mentioned in my wiki here.

As stated before you will loose the factory settings and the ability to restore them via the advanced boot options.

You should make the recovery discs or/and have to hand all you need to perform a Clean Install of Windows. Copy all the files required for a clean install to an external harddrive aswell as any precious personal files again just in case. I recommend doing this on a regular basis of course in case of hard disc failure.

suppose i create my files, docx, xls etc where must saved, where is my files save partition? I can see ONLY one drive C:/? must saved to "Documents" folder since is the file partition, or...?

AOMEI Partition Assistant could directly split your existing partition in order to make a now partition, so that you do not need to resize the partition manually by yourself if you are not familiar with that www.pcworld.com/.../aomei_partition_assistant_home_edition_review_partitioning_utility_is_great_for_home_or_business_us.html

Hi sir，

you may consider using a software to create a partition. My friend recommend me to use the Partition assistant developed by AOMEI.tech. For more specified steps please check www.disk-partition.com/.../create-partition.html