The CompactFlash Association has announced the new CFexpress 4.0 standard. Available in Type A, Type B and Type C varieties, the new specification doubles the speeds compared to the current CFexpress 2.0 specification.
This means that CFexpress Type A cards for Sony shooters now have a theoretical maximum transfer speed of up to 2GB/sec, falling in line with CFexpress 2.0 Type B cards. Type B also doubles, offering a hypothetical 4GB/sec.
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