A&H can’t get around the 4GB file size limit of FAT32. However, since the multitrack recorder produces single mono files, one recording can be quite long. I must admit, I never tried to go beyond something like 3 hours in my CQ and SQ (which seem to share the same recorder implementation). If i pocket-calculated correctly, 4GB of 24/96 mono should be around 4.14 hours. This should also be what the recorder says is the available recording time, even when using very large storage (I have one setup with a 2TB SSD on the SQ). When set to 48khz, the limit is 8.something hours, which makes sense, since it is only half the number of samples per second.
Concerning the SD card, I use Sandisk Extreme Pro cards. This actually came from my other job, doing video, where I needed cards that could swallow a lot of data on the spot. I found those SD cards to be reliable in my cameras, and I simply put one of those in my CQ. That CQ doesn’t even need that speed from the card. But that speed is also more convenient when transferring the recording to your computer.
When arming the recording, it takes quite a while with larger storage, so a smaller card (128GB or less) might be a better choice. Also they’re cheaper.
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