I guess it depends on what "large file" and "regular size SD card" mean to you.
replyThe best selling SD card on B&H is 128 GB. Let's consider that "regular size".
Fujifilm's GFX100 II is a popular medium-format mirrorless camera. Its sensor is 102MP. So each 14-bit RAW image is about 170 MB.
102M pixels x 14 bits = 1.428B bits = ~178M bytes = ~170 MB
So a 128 GB SD card can hold ~771 images that are 170 MB. That's a lot more images than a standard roll of film.
I think they meant that you can pad your regular SD card with random data and
leave just enough space for a few photos.
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