Applies to: Sony ILCE-7M4, Nikon Z8, MRW-G2 and OWC Atlas Dual examples; current camera firmware/mode table controls.
What the path requires
- Record full card standard/type and speed class, not just capacity.
- Match camera slot and recording mode including proxy/S&Q/simultaneous constraints.
- Match reader form and upstream link separately.
| Media and recording decision | Camera/slot condition | Reader and host path | Keep separate |
|---|---|---|---|
| Sony SF-G128T: SDXC UHS-II, V90 | ILCE-7M4 ordinary XAVC S-I 4K 600Mbps table case; confirm proxy/two-slot conditions | MRW-G2 SD slot → supplied USB-C data cable → documented USB host | The Type-A-only S&Q footnote is a different recording mode |
| Sony CEA-M960T: CFexpress Type A, VPG200 | ILCE-7M4 footnote-2 S&Q case; current camera software required | MRW-G2 Type A slot → supplied USB-C data cable → documented USB host | Type B is not Type A; reader recognition does not qualify recording |
| Nikon MC-CF660G: CFexpress Type B | Z8 named recommendation for N-RAW/ProRes RAW; check complete mode and firmware | OWC Atlas Dual Type B slot → integrated USB-C data cable → documented USB host | Type B shape does not establish XQD support |
| CFexpress Type B plus SD ingest | Recording requirements still belong to each camera and card | OWC documents simultaneous Type B + SD ingest | Shared upstream and destination limits are not per-slot sustained-rate guarantees |
SD UHS-II / V90
SF-G128T is documented UHS-II/V90. ILCE-7M4 lists V90 SDXC as one route for ordinary XAVC S-I 4K 600Mbps, but its S&Q footnote contains a CFexpress-Type-A-only case. MRW-G2 supports UHS-II SD offload; simultaneous card use is not established here.
ILCE-7M4 — Memory cards that can be used · MRW-G2 CFexpress Type A / SD Card Reader · SF-G128T SpecificationsCFexpress Type A
ILCE-7M4 supports Type A; Type B is explicitly excluded. Its high-rate/S&Q cases can require VPG200 Type A. MRW-G2 is a Type A/SD reader, not a Type B/XQD reader.
ILCE-7M4 — Memory cards that can be used · MRW-G2 CFexpress Type A / SD Card ReaderCFexpress Type B / XQD
Z8 documentation lists Type B and XQD, then recommends specific cards for N-RAW/ProRes RAW. OWC Atlas Dual supports Type B and SD; do not infer XQD support from Type B shape.
Z8 Reference Guide — Approved Memory Cards · OWC Atlas Dual CFexpress + SD Card ReaderSimultaneous slots and the upstream link
OWC documents simultaneous Type B+SD ingest on its Atlas Dual. Shared upstream capability is not a per-slot sustained-rate guarantee. Verify copy integrity and backups before reusing recording media.
OWC Atlas Dual CFexpress + SD Card ReaderExact Type A card example
Sony CEA-M960T is a Type A VPG200 card. Sony names Alpha 7 IV in its compatibility context and requires current camera software; retain the precise camera mode and firmware check rather than treating reader recognition as recording qualification.
Sony CFexpress Type A Memory Card 960GB — CEA-M960TYour next useful observation
Write camera firmware/mode, exact card and slot, reader model/cable, host port and destination.
Keep these limits
- No recorded movie, sustained-write/offload benchmark or card-approval test.
Source documents, revisions and inspection methods
ILCE-7M4 — Memory cards that can be used
Sony · Help Guide 2110/v1; revision unavailable
Movie and S&Q recording tables; CFexpress Type B exclusion; file-system note
Inspected 2026-10-23 by public_page. Primary HTML body/relevant tables inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact camera mode/media requirements.
Read the original sourceMRW-G2 CFexpress Type A / SD Card Reader
Sony · Live revision unavailable
Features: supported card types, USB3.2Gen2 and supplied C/A cables
Inspected 2026-10-23 by public_page. Primary HTML body/relevant tables inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact reader upstream and media classes; simultaneous use not established.
Read the original sourceSF-G128T Specifications
Sony · Live revision unavailable
General Features: UHS-II, V90/U3, capacity
Inspected 2026-10-23 by public_page. Primary HTML body/relevant tables inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact SD card media/speed-class evidence; not a camera qualification test.
Read the original sourceZ8 Reference Guide — Approved Memory Cards
Nikon · Live revision unavailable
Approved memory types; N-RAW/ProRes RAW recommended cards
Inspected 2026-10-23 by public_page. Primary HTML body/relevant tables inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact Nikon MC-CF660G recommendation for named recording types.
Read the original sourceOWC Atlas Dual CFexpress + SD Card Reader
OWC · Live revision unavailable
Convenient Versatility; simultaneous ingest; bus power and cable; performance footnotes
Inspected 2026-10-23 by public_page. Primary HTML body/relevant tables inspected; AI-assisted source reading, no independent human review or hardware validation.
Exact CFexpress TypeB + SD reader; aggregate performance is conditional.
Read the original sourceSony CFexpress Type A Memory Card 960GB — CEA-M960T
Sony Electronics · Live product revision not stated
Sustained recording for video; Which Sony cameras are compatible; MRW-G2 pairing; exact model
Inspected 2026-10-23 by public_page. Primary Sony HTML product page opened directly in web reader; model, sustained-recording and exact-camera compatibility FAQ paragraphs read. Not search-excerpt-only evidence.; AI source reading, not independent human review or hardware validation.
Exact Type A VPG200 card, α7IV compatibility context and current-camera-software condition. No independent recording test.
Read the original sourceSource-documented education. Hardware behavior and independent human review have not been performed for these examples.