Upgrading ssd not recognise

Hi guys,

I'm trying to replace my current ssd with transcend jetdrive 850 ssd but once I have done the replacement I got this flashing question mark folder. After that I reboot it in recovery mode and found out that the new ssd is not listed as if it's not detected in disk utility. Then I tried going to restore the backup using time machine and it's not there in the destination disks either. I tried to send a mail to the transcend producer but I also hope someone can help me with this. Really appreciated and thank you.

MacBook Air 13", 10.14

Posted on Feb 19, 2019 11:57 PM

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dwb

Level 7

33,310 points

Posted on Feb 20, 2019 10:51 AM

You didn't tell us why you are replacing the original SSD. If you said you were upgrading I'd suspect reason 1 or 2 below. If you said your original SSD stopped functioning I might suspect that the malfunctioning SSD involved reason 3.

There are three possibilities:

you didn't seat the new SSD properly -
the SSD is defective
the logic board is damaged

The first thing to try is remove the SSD and then reseat it. There should be a satisfying 'snick' when the drive is seated properly. If you still have no luck, assuming you are just upgrading to a larger drive, reinstall the original SSD and make sure it works. If so, you can contact the seller for a replacement.

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Upgrading ssd not recognise

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