[Nook HD, HD+ Q&A, Help & Troubleshooting] slow_mo_panda:
If This Helps Anyone...

I spent roughly 4 to 5 days' worth of working hours sitting here at my laptop, trying more and more frustratingly, to get my Nook HD+ to take the new CM Rom, and then dealt with about a dozen full 1080p HD movies I had already spent about 3 hours each to convert to .mp4 and the right size for my Nook, which now was not showing ANY of the content on my 32g SD card. Well, I tried all the formatting (using the SDformatter program), all the re-booting and putting the content directly on it through the Nook, and putting the files on it through my laptop, and I got nothing.

Finally, after noticing a theme among most of the users who were having problems specifically with SanDisk and/or 32gb sized cards, I took the awesome (and expensive) 64gb class 10 SDXC Samsung card out of my Note 2 phone, and formatted that one using the SDF program, and put it on 'exFAT', and after putting the blank card back in my Nook (powering it off fully first), I had to COPY THE FOLDER FROM THE NOOK'S MAIN STORAGE CALLED "MY FILES" AND PASTE IT INTO THE SD CARD STORAGE. Then, I opened it and made folders inside that one for Movies, Music, eBooks, etc... I then loaded the movies onto it via the Nook itself, making sure to paste the files into the SD folder. I also noticed that I needed to keep the Nook from falling asleep, and set it to the highest setting of time before it would go into sleep mode (30 min) and had to keep swiping the screen to reset that time. I also just loaded one large movie file or a few smaller video files at a time, because if the screen went off, or if I had videos loading onto the Nook for more than a couple minutes, then I would get the frequently reported error saying that it 'could not copy'.

After doing all of this, I was finally able to start a couple of my movies with minor problems. I hate how it says in the video player I was using, that you have to use the right side touchscreen to swipe on an invisible volume control up or down, and it was extremely sensitive but also not easy to control.

So, to review:

-Try using a different card other than SanDisk and 32gb

-DL the free SDformatter program and use that to format ANY card you put in your CM rooted Nook! Try to set it at 'exFAT' also.

-Power OFF the Nook before installing the new SD card.

-Then plug the Nook into your computer, and COPY-PASTE the file folder "My Files" in the Nook's MAIN STORAGE and put it into the SD card. Make folders inside this one to sort your movies, music, books, etc.

-Copy-Paste your files that are NOT eBooks from your computer into the new 'My Files' on the SD card. (I suggest using Calibre or another program to load eBooks into your Nook after you have gotten all the metadata correct for each book.) Keep the Nook 'awake' and do not allow the screen to enter sleep mode during loading of files. Make sure to load only about 3 minutes' worth, or no more than one LARGE movie file at a time onto the Nook, to prevent it from disconnecting and giving you an error pop-up.

That should do it, and if you have problems after this, then maybe ask around more. I only know how this works by my own extensive (and exhausting) trial and error...