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Should You Turn Off Phone Before Removing Sd Card? [Solved]

No, you don’t have to power off. SIM cards can be removed at any time. The only thing to do before removing an SD card is to Unmount it (in the Settings>Storage​ menu). If you don’t see an option with the word “Unmount,” then look for an Eject icon associated with the SD card.12 Aug 2018

Safely Eject MicroSD card from your Smartphone

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How to Fix SD Card Unexpectedly Removed Error on Android Phone

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