SDXC cards, SDHC cards, and exfat

[micrometers]

I have a nook hd. I mainly use it to watch movies.

Looking into getting an sd card to expand it. SDHC is cheaper than SDXC.

However, it is also slower (problem for hd movie)

exfat is important because fat32 has a 4gb file size limit. This is a problem for high resolution movie files which are often over 10gb.

So, could I take a cheaper SDHC card and reformat it to exfat? Or should I just play it safe with SDXC?

 

[razel]

I wouldn't worry about the read speed. I have cheap SDHC cards that bench at 28MB/s 2 years ago. I get a feeling that the Nook HD wouldn't be able to read beyond that. It is the minimum sequential write speed that is guaranteed to be at a minimum that is plenty for SDXC when recording high resolutions movie files.

Yes, you can take an SDHC card and reformat it to exfat.

 

[micrometers]

Wait a sec.

These are write speeds, right?

Read speeds should actually be the same across the board.

In my case, a class 4 should be enough.

 

[razel]

Read speed is NOT always the same. In fact, two class 10 (10MB/s writes) uSDHC cards I bought the past few months bench between 18-22MB/s reads as opposed to the uSDHC cards I bought years ago which bench 24-28MB/s reads.

However, as I mentioned, I seriously doubt the Nook HD will even read that fast.