Hi Ian,
It's the tablet, but as you say, it's the same OS. You are right; there is no problem loading music files and jpegs to the SD card, but the magazine apps are a problem. You can tell them to use the SD card, but they don't seem to use it for bulk storage. For example, if you get BRM from Pocketmags, you'll see what I mean. I told it to use the SD card, but it chewed up all the internal memory storing the monthly editions. Same thing happens with Zinio. It may be deliberate policy to protect copyright infringement, but I'm not sure.
Maybe I'm doing something wrong - it would be great if I am, but I don't think so. There are quite a few postings on the web about this issue.
BTW, you could post your bird pix on the rmweb garden birds forum.
Cheers,
Andy