Trying to decide on what capacity i need. 160gb or 80gb. how much storage does the a7s iii need ?

I would suggest getting the 160GB version. Actually, if you can, get two. You need these cards in particular for 4K@60 or 4K@120 video (or 8K@30 on the A1, which is equivalent to 4K@120 in terms of storage requirements) - you can use a regular UHS memory card for lower video settings. You can record about 30 minutes of 4K@60 video on a 160GB CFexpress Type A card. Other combos are pretty easy to do the math on based on that. For example, if you were shooting 4K@120 with a single 80GB card, you'd only be able to store about 7.5 minutes of video before running out of space. So if you populate both slots on the A7S3 with 160GB cards, you can record about an hour of 4K@60 video.

will this let me record in 4k 24fps on my FX3? Also can I record slow mo on the fx3 with this?

Hello, THank you for reaching out. Sony's commitment to customer satisfaction is our top priority. Yes this card will allow you to do both 4k 24fps and Slow Motion on you FX3. -Linda Sony Social Support

is it compatible with sony fx30?

Sony's commitment to customer satisfaction is our top priority. Yes, this memory card is compatible with the Sony ILMEFX30

I suppose this is designed towards video right? A mainly stills photographer won't need this expensive card?

If you use the Sony A1: this is the only card you should consider to get the best out of this sophisticated camera. If you want 30fps - you will need this card. They are better, robust and the right thing to do if you've spent the money, getting the A1.

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CEA-G160T 160GB CFexpress Type A Memory Card (CEAG160T)

Product ID: 272237414

Details

Brand
Sony
Compatible devices
ILCE7SIII
Flash memory type
CFexpress
Memory storage capacity
160 GB
Model name
Sony Cfexpress

⚡800MB/s read speed

🔥700MB/s write speed

🛡️IP57 water & dust resistance

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Description

🚀 Capture Brilliance, Store Fearlessly

ALL WEATHER PROOF - IPX7 water and IP5X dust ingress protection ensure your memory card thrives where others fail.
RUGGED RELIABILITY - Up to 5X drop impact resistance and 10X bending resistance means your data stays safe in any environment.
SMART DATA PROTECTION - Supported by File Scan Utility and Memory Card File Rescue software to keep your valuable files intact.
BLAZING FAST TRANSFERS - Experience ultra-responsive 800MB/s read and 700MB/s write speeds for seamless 4K/120p video capture.
ENGINEERED FOR ENDURANCE - New heat sink design keeps your card cool during marathon shoots—no throttling, just pure performance.

The Sony CEA-G160T 160GB CFexpress Type A Memory Card delivers professional-grade speed with up to 800MB/s read and 700MB/s write speeds, optimized for 4K/120p recording. Its advanced heat sink design enables extended recording sessions without overheating. Built tough with IP57 water and dust resistance plus enhanced drop and bend durability, it’s engineered for demanding environments. Supported by Sony’s diagnostic and recovery software, this card ensures your data is protected and accessible, making it the go-to choice for serious creators.

Specifications

ASIN	B08DRQ6KLL
Additional Features	High-Speed Performance; Made Incredibly TOUGH; Rapid-Response Photography
Best Sellers Rank	#17,135 in Computers ( See Top 100 in Computers ) #64 in SecureDigital Memory Cards
Brand	Sony
Color	Black
Compatible Devices	ILCE7SIII
Customer Reviews	4.8 4.8 out of 5 stars (335)
Flash Memory Type	CFexpress
Hardware Connectivity	CompactFlash
Item Dimensions D x W x H	20D x 28W x 3H millimeters
Item Dimensions L x W	28L x 20W millimeters
Item Type Name	Memory Card
Item Weight	0.01 Pounds
Manufacturer	Sony
Media Speed	800
Memory Storage Capacity	160 GB
Mfr Part Number	CEAG160T
Model Name	Sony Cfexpress A TOUGH card
Model Number	CEAG160T
Read Speed	800 Megabytes Per Second
Secure Digital Association Speed Class	Class 6
UPC	027242914537
Unit Count	1.0 Count
Warranty Description	One Year
Warranty Type	Limited

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