Samsung Galaxy s9+. Tmobile. It keeps the pictures sometimes. Lot of grey icons with an exclamation in the middle. Using the camera on the phone and the phones gallery. Same problem with some videos saying can't read or play file even though there kb in the storage details. This has been going on for the past 10 months. I'm VERY leery about taking pictures, especially for special occasions. I don't want go to factory reset, since I've read others have done that and still have the same problem.