I am having an issue with my alcatel a30 tablet (9024w) and the problem is that when i format an sdcard as internal storage then remove it and insert it, i get a device missing warning telling me to reinsert the sdcard.

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    You remove the card while the device is up and running? If so, no wonder. Ever tried removing the (only) hard disk from a running PC? Making the card the internal storage, it is used as such and must not be removed while the device is running. – Izzy Sep 8 '17 at 10:43
  • Well i wouldnt need to remove it if it worked but it wont show up – Ethan Law Sep 9 '17 at 0:25
  • Then maybe you edit your question and include a more detailed description of the issue? Hard to help without having the full picture here. // PS: Is your issue the same as adoptive sd card missing please re-insert? – Izzy Sep 9 '17 at 12:21
  • Glad to read, and thanks for the feedback! Mind to answer your own question with some details (especially useful if you have some hints; might help on the linked question as well)? Eg. whether it suddenly worked again after a reboot, or whatever. – Izzy Sep 9 '17 at 17:37

I bought my sd card used and it turned out there was a master boot record that was messing with android

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