memory card

A friend of mine was bothering me for a year now because they bought a Sony a6400 and they didn’t know how to work it. Eventually I came over (Saturday) and he told me that there was a memory card read error. Stupid me, I took my memory card out and stuck it in his camera. Some how, I got his...

Can anybody help me please, im having trouble when i export a image from lightroom 5 to my memory card, when i took it to be printed the copy was under exposed when printed out, i dont no why.

Formatted on my D750, then shooting, my PC (Windows 7 premium) will not open the card. It gives a message saying the card must be formatted. I did format it in the PC, took photos, and it did then open. I would rather format it in the camera, for that probably has some benefits.I would think...