need help

[ghost]

I've been using my Sony a7iii for about 4 years. today I took some black and white and sent them to my phone with bluetooth the pictures are in KB I want to make a 30 by 40 print so I pulled my SD card and put in my MacBook and the pictures show on the bottom bar in black and white but when I send them to light room the pictures are in color and I can't update my camera 

has this happened to anybody ?

[CarolineJensen]

When you send the images to your phone, they may be in a very small format. If you shot raw and then open in Lr, the files will be in color because raw is all the data, including color. If you shot raw + jpeg, then you may have both black and white and color in your Lr once you import.