I’m laughing as I had the same problem with a Sandisk micro SD adapter. The slider on the adapter slips to the write protect setting as it is inserted into the card reader. Solution? Tape the slider in place with a small piece of scotch tape.
Perhaps instead of tape, you should glue the slider in the non protected setting with a very small amount of glue. With tape, there is always the chance the tape comes off, and gets stuck in the card reader. if you use a bit of glue on the adapter, make sure the glue is dry before putting the adapter into the reader.