You Could Upgrade Your Surface Pro 7+, But They’d Rather You Didn’t
Microsoft have come up with a brainstorm! They have this insane idea to enable Enterprise customers to be able to swap out the SSD in the relatively new Surface Pro 7+ with a different one, called a Surface Removal SSD or rSSD. They do not want to encourage you to do this however, the move is a reluctant acceptance that many Enterprise customers prefer to purchase systems which they can remove and replace the drive when deploying it to a new employee.
They will not make these Surface Removal SSDs for consumers, only Enterprise customers will be able to purchase the drives, so don’t go thinking you will be able to replace a bad SSD a few years down the road if the one installed in your Surface Pro 7+ goes bad. As well, Microsoft strongly discourages you from replacing your rSSD with one of higher capacity, even if Windows hits the point where your OS takes up the vast majority of the 128GB drive which came with your Surface Pro 7+.
Their statement reads “Installing a third-party SSD or a different Microsoft SSD (of another volume size) may result in reduced performance and unsupported configurations.” You might well wonder when Microsoft designed their own unique SSD, including flash and controller, which is somehow designed in a way which is completely different from any other manufacturers. You might also wonder how installing a larger bespoke SSD, with or without a larger cache, would negatively impact performance, as we certainly do. Perhaps, as in many cases, you can blame BitLocker?
Unveiling the range of Surface Removal SSDs (rSSDs), Microsoft admitted that popping in something bigger to replace an existing storage device was "technically possible", but it "strongly discourages" users from doing so.