[Pedro Amaral] “Would using one of these SD cards be any advantage to hold cache in AE? “
Short answer: No.
[Pedro Amaral] “Would it be too slow to read from?”
Much slower than the SSD in the Macbook. Depending on the speed from 3 to 10 times slower. If you’re looking at the Transcend JetDrives, they’re really for storing data that doesn’t require the fast read or write speed.
[Pedro Amaral] “Will AE even recognise and accept the SD Card as a drive as Disk Cache destination?”
It will, but its not worth it.