A:Answer Hi Slick,
Thank you for reaching out and interested in whether the Galaxy Z Flip3 caters to a microSD card. Unfortunately, the device doesn't cover an SD card slot.
For your reference, you may visit the user manual on Page 13:
https://downloadcenter.samsung.com/content/UM/202201/20220112001459078/SAM_F926_F711_EN_UM_OS12_010722_FINAL.pdf
Should you need more assistance, you may reach us via the following for immediate support:
1. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
2. Facebook Messenger: http://m.me/samsungsupport
3. Twitter: https://twitter.com/messages/compose?recepient_ id=18768513
Reference Number: 1144291870
Thank you for choosing Samsung. Have a great day!
^Chrystel