DELL XPS 2720 MSATA 32GB replacement

First uninstall Dell Backup and Recovery and then install the latest version from here:

http://www.dellbackupandrecovery.com/en-us/Index2.html

Then make a new Recovery USB using the latest version of Dell Backup and Recovery:

The Recovery USB made from the latest version will have enhancements over any media created by earlier versions. Specifically it will allow for clean installation on a new (smaller) hard drive than the original which previous versions didn't allow.

In your case you are going for an install on a 1-2 TB conventional HDD with a 32 GB mSATA cache drive with an Intel Smart Response Technology SATA operation setting up the mSATA drive as a cache drive to a direct install on a 256 GB mSATA drive with an AHCI BIOS operation.

The first thing you will need to do is to change the SATA operation, see here:

http://dellwindowsreinstallationguide.com/ensure-you-have-the-correct-sata-configuration-in-the-bios-setup-for-your-configuration/sata-operation/

Then you will need to replace the SSD, see the Owner's Manual XPS 2720 page 47-48:

http://ftp.dell.com/Manuals/all-products/esuprt_desktop/esuprt_xps_desktop/xps-27-2720-aio_Owner%27s%20Manual_en-us.pdf

Next you should be able to reinstall Windows by using the Recovery USB, see the instructions here:

Thnx for the answer!

But i want to buy a mSATA from samsung, the mSATA 32GB in my DELL is from LITEON.

Will my DELL recognise the samsung 840 evo without troubles?

Regards

It should be fine, plenty of people upgrade to a Crucial or Samsung SSD. There was even a Dell Samsung SSD IdeaStorm session.