I purchased a VAIO DUO 11 Ultrabook in March 2013. It came with a 256GB Toshiba model THNSNS256GMCP SSD. I would like to upgrade to a 512GB or 1TB SSD, but Sony said that it could not be upgraded. Can anyone shed some light on the the reasons for this and perhaps a path to upgrade the SSD or what to do if I need to replace the current SSD sometime in the future? Sony's parts vendor does not appear to have replacement SSDs listed for this machine.
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