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I have a early 2015 MBA 11" because my logicboard in the old 2013 model died from a bad power adaptor. in the new mea is only a 128 GB SSD. Can i change my old 256 GB SSD (MBA 11" 2013) into the new MBA 11" 2015? Apple Service tells the 2013 an 2014 SSDs can be used in both models, but don’t write anything about 2015 models. For this reason the ASP next to me will not make the change (thought about it to keep the warranty). Can anybody tell me if there is a difference between the SSD models (power, pins, form factor, ..) or is it save to put the older (bigger) SSD in the new device? Thanks noop

Yes & No ;-{ While your older SSD is PCIe (2 lane) like the newer model, the firmware on it may not work in your newer system. As you don’t have a working system you’re caught in a bad place as you can’t upgrade the firmware before transferring it to your newer system. Also the SSD Apple used in the older systems was a slower unit than what they are currently using. So what to do here? I would recommend not trying to swap them, instead get an external SSD case for your older SSD like this one: OWC Envoy Pro. If you really want more space how about getting a better SSD instead. Here is what I would go with: OWC - MacBook Air 11" & 13" Mid 2013, 2014, & 2015 SSD upgrades.