The new Sony a7S III is one of the best selling full frame mirrorless cameras for videography. In order to shoot 4K video at 120p, you’d better get a fast memory card for Sony a7S III. a7S III has two memory card slots, both support UHS-II SD memory cards and CFexpress Type A memory cards. Accessories Tested has reviewed and tested latest memory cards, and below are top recommended ones for Sony a7S III:
Best CFexpress Type A Cards for Sony a7S III:
Currently, only Sony, Delkin Devices, ProGrade Digital have released CFexpress Type A cards, these cards has max read speed at 800MB/s, and max write speed at 700MB/s.
| Card | Max. Read Speed | Max. Write Speed | Check Price |
| Sony Tough CFexpress Type A | 800 MB/s | 700 MB/s | Amazon/B&H/Adorama |
| Delkin Devices CFexpress Type A | 880 MB/s | 730 MB/s | Amazon/B&H/Adorama |
| ProGrade Digital CFexpress Type A Cobalt | 800 MB/s | 700 MB/s | Amazon/B&H/Adorama |
Best UHS-II SD Cards for Sony a7S III:
Since the CFexpress Type A cards are very expensive, you may also consider UHS-II SD memory cards, these cards are also top recommended cards for Sony a7S III. Currently the fastest & toughest UHS-II SD memory card is Sony’s best selling SF-G UHS-II Tough SD card, this card has fastest read speed at 300 MB/s & write speed at 299 MB/s. You can take a look at recommended UHS-II SD cards for Sony a7S III below:
| Card | Max. Read Speed | Max. Write Speed | Check Price |
| Sony SF-G Tough UHS-II SDXC | 300 MB/s | 299 MB/s | Amazon/B&H/Adorama |
| SanDisk Extreme PRO UHS-II SDXC | 300 MB/s | 260 MB/s | Amazon/B&H/Adorama |
| Lexar Professional 2000x UHS-II SDXC | 300 MB/s | 260 MB/s | Amazon/B&H/Adorama |
| Hoodman Steel 2000x SDXC UHS-II | 300 MB/s | 260 MB/s | Amazon/B&H/Adorama |
| ProGrade Digital UHS-II SDXC | 300 MB/s | 250 MB/s | Amazon/B&H |
| Delkin Devices Power SDXC UHS-II | 300 MB/s | 250 MB/s | Amazon/B&H |
| Sony SF-M Tough UHS-II SDXC | 277 MB/s | 150 MB/s | Amazon/B&H/Adorama |
| Lexar Professional 1667x UHS-II SDXC | 250 MB/s | 90 MB/s | Amazon/B&H/Adorama |
Best UHS-I SD memory cards for Sony a7S III:
The UHS-I SD memory cards are much cheaper than CFexpress and UHS-II SD cards. Currently the fastest UHS-I SD card is from SanDisk, the SanDisk Extreme PRO UHS-I SDXC card has max read speed at 170MB/s and max write speed at 90MB/s. Take a look at recommended UHS-I SD cards for Sony a7S III:
| Card | Max. Read Speed | Max. Write Speed | Check Price |
| SanDisk Extreme PRO UHS-I SDXC | 170 MB/s | 90 MB/s | Amazon/B&H/Adorama |
| SanDisk Extreme UHS-I SDXC | 150 MB/s | 70 MB/s | Amazon/B&H/Adorama |
| Lexar Professional 633x UHS-I SDXC | 95 MB/s | 45 MB/s | Amazon/B&H/Adorama |
| PNY Elite Performance UHS-1 SDXC | 95 MB/s | – | Amazon/B&H/Adorama |
| Transcend UHS-I SDXC | 95 MB/s | 60 MB/s | Amazon/B&H/Adorama |