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first you probably need a pentalobe screwdriver
then go to ifixit.ccom to see if your beloved MacBook can be upgraded.
just make sure you disconnect the battery before swapping drives.
have fun!
 
Typically one should give a model of Mac to help the community provide accurate answers these kinds of questions.
 
Yeah, maybe they forgot they posted, or maybe they got busy. No point in providing any more advice if we don’t know what machine we’re talking about.
 
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