I bought a transcent jet lite sd card for my macbook pro mid 2014. On MacOS 10.15.4 whenever my macbook goes to sleep my sd card automatically ejected and there is no device in disk utility to mount again and I had to physically put sd card again and it's annoying.

I tried these but none of them solve my problem.

  1. Reset SMC
  2. uncheck put hard drives sleep in energy saver
  3. Install Mountain App
  4. Installing jetdrive toolbox and turn it on
  • This probably won't help but it might. Try running First Aid on the SD and make sure it is in HFS or APFS. Sometimes Mac computers can act up with NTFS, FAT, FAT32, and ExFAT drives. Try checking if the issue is there in Safe Mode. That will determine whether it is a third-party application tampering with the settings or not.
    – Todd
    May 1 '20 at 21:52
  • I forgot to include this but here's a link on Safe Mode: support.apple.com/en-us/HT201262
    – Todd
    May 1 '20 at 21:52
  • I've had USB drives automatically eject from my MacBook every time it goes to sleep for a while now, I think at least since 10.13.
    – At0mic
    May 1 '20 at 22:56
  • @Todd my sd card is HFS+ but surprisingly I dont have this problem in safe mode how can i figure out which application cause this problem ?
    – Siyanew
    May 2 '20 at 13:02
  • @At0mic for usb check this out fix-usb
    – Siyanew
    May 2 '20 at 13:03

Finally I found what my problem it is I open console.app and filter with /dev/disk2 and found out transcend helper eject my disk so I uninstall app and delete helper tools and then reboot.

Command to delete transcend helper tools:

sudo rm /Library/LaunchDaemons/com.transcend.TSSleepHandlerHelp.plist
sudo rm /Library/PrivilegedHelperTools/com.transcend.TSSleepHandlerHelp

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