macbook air 2017 SDcard max storage support
Can the macbook air 2017 support an sdcard 512gb? and what is the maximum storage capacity it can detect for an SD card.
MacBook Air 13″, macOS 12.7
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I don't know the answer to your question.
MacTracker indicates that the card slot is a SDXC card slot. SD Association – Capacity (SD/SDHC/SDXC/SDUC) indicates that the SDXC standard is for cards with "more than 32 GB" and "up to 2 TB." So if you come across a card which has more than 2 TB (not that you're likely to come across one in the near future), you'll know for sure that it is incompatible and will require an external reader.
MacBook Air (13-inch, 2017) - Technical Specifications - Apple Support confirms that the slot is a SDXC slot.
Use the SD and SDXC card slot on your Mac - Apple Support doesn't go into much more detail.
P. S.: Do be careful when buying high-capacity cards as there are many scammers who sell cards rigged to report more capacity than they actually provide. You may not discover this until after you have stored a lot of data – then tried to read some of the data you stored first, only to discover that it's gone.