Sorry for the bump, but I have the same problem with NOR when it reaches 254Mb. I just purchased the new microsd model yesterday and this seems to be the only thread that has anything to do with it. Have you guys come up with a solution or an easy way to get past it? Thanks.
Just ordered one from aliexpress! A couple days ago I found an AGS-101 at a thrift shop for $40 and I had to get it. When it arrives I will post a review of it.