Throw the MicroSD card. Or use it for something not important as MicroSD, not with adapter. Adapter is other device (passive but intermediate) and can cause a some unpleasantunpleasant side effecteffects. YouYour camera is for SD cards so buy SD card and use it.
The problem with camera can be caused by battery not keeping the charge (battery with end of charging resource, usually you can count for 200-300 changers per battery). Try with new battery, freshly charged.
And do not forget batteries and storage cards are consumables and over the time must be replaced.