Your mistake was buying a micro SD card and adapter. Many, many folks on here say to NOT use micro SD cards with adapters. Cameras just may not work well with them. Only use standard SD cards.
Also, what size card is it? Cards of too-large capacity will not work. What that capacity is depends on the camera. 8, 16, 32 GB cards should work fine, and hold A LOT of images. And using very large cards, even if they work, is not a great idea. It is too tempting to save a lot of stuff on one card, risking total loss if the card gets damaged or corrupted.
Use multiple cards. Rotate them in the camera. Loss of one is not total loss. Best practice is to move photos to a computer or flash drive for storage. Format card in the camera regularly.
