Chosen Solution
Hi, I have a Macbook Pro Retina MId 2015 250 GB and I’d like to upgrade my SSD to 480 GB or even 960 GB. I checked several options for a replacement (i.e. Transcend Jetdrive 820 or the most recent 850) but I am worried that disk write and read speeds will be negatively affected. With the Apple SSD my Macbook scores 1033 MB/s and 1950 MB/s at the Blackmagic Disk Speed Test. These speeds seem not even be supported by the aforementioned SSDs (up to 950 for the 820 and up to 1300 for the 850), but I am not sure if these measurements should actually be compared with each other. Thank you in advance for any advice you can provide on the matter, especially if you have some personal experience with such an upgrade
Another option is just getting a larger Apple drive while more expensive it will give you the same if not better I/O speed. Here’s a useful guide The Ultimate Guide to Apple’s Proprietary SSDs as an example SSPOLARIS 512 GB SSD
I had a terrible experience trying to use an OWC 512 GB SSD - the one they recommended, but they were pretty cage-y. It was 0.1 mm thicker than the OE SSD, and required unusually high force to insert, which twice caused a motherboard failure. OWC: “it meets the Apple spec”; not our problem. I counted it a tough learning experience. I sprung for a used OE Apple 512 and have never been sorry. My biggest regret was learning that OWC would not back up its product warranty. Now wary of everything they sell.
