SF3 Series CFast 2.0 Pro Thunderbolt Card Reader
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Driver (1)
Firmware (0)
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Manual (1)
FAQ (5)
IDArticle TitlePost Date
922 Can I get a longer cable for the CFast 2.0 Pro Card Adapter?Oct-24-17
924 Can I connect the CFast 2.0 Pro Card Adapter to a Thunderbolt 2 Mac?Oct-24-17
Thunderbolt 2 does not have enough power to directly connect a Thunderbolt 3 bus-powered device like the CFast 2.0 Pro Card Reader. However, you can connect the CFast 2.0 Pro Card Reader if you have an intermediate Thunderbolt 3 device in the chain that is wall-powered, for example the Sonnet SxS Pro Card Reader.

Thunderbolt 2 Mac----Apple TB 3 (USB-C) to TB 2 Adapter----Wall-powered Thunderbolt 3 Device----CFast 2.0 Pro Card Reader

Note that the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter is reversable and will support a Thunderbolt 2 Mac and a Thunderbolt 3 device (as well as a Thunderbolt 3 Mac and a Thunderbolt 2 device).
 
1040 Upon connecting the CFast 2.0 Thunderbolt 3 Card Reader, I see an error message "Accessory Needs More Power"Dec-18-18
1137 Under Windows, CFast cards are not mounting.Feb-18-21
1162 Some cards, notably 960GB Angelbird or RED cards drop offline.Oct-11-21
These cards draw more power than the official specification. Sonnet has revised the CFAST reader to accomodate these cards. The original CFAST Reader had serial number starting with "A". Modified CFAST Readers have a serial number starting with "B". Sonnet is offering a free upgrade from A revision to B revision for customers with this issue.