Yes, the Canon EOS R5 Mark II is compatible with the ProGrade Digital CFexpress Type B Gold 128GB.
Canon EOS R5 Mark II accepts CFexpress Type B in Slot 1. ProGrade Digital Gold CFexpress Type B 128GB writes at 260 MB/s (250 MB/s sustained) -- clears this camera's standard compressed 4K modes, but NOT its RAW/SRAW modes, which Canon's own manual states require a card rated 400 MB/s or faster. Same real numeric gap already identified on this exact card against the Canon EOS R3 -- corrected 2026-06-21.
Limitation
Insufficient for Canon R5 Mark II's RAW or SRAW recording modes (requires 400+ MB/s sustained per Canon's own manual); this card sustains ~250 MB/s. Works for all standard compressed 4K/8K modes within this camera's lower-tier floors.
“RAW Standard RAW 29.97 CFexpress 2.0 Type-B [400MB/sec. or faster]”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)