Yes, the OM System OM-5 is compatible with the ProGrade Digital V60 128GB SD.
ProGrade Digital V60 128GB SD is V60 class. Meets the floor for: 4K30 (30 MB/s floor). (Peak write 130 MB/s is not evidence of sustained performance; the V60 class rating above decides this.)
“OM System OM-5 product page: 4K 30p at up to 237 Mbps; V60 UHS-II SD card provides sufficient write performance for 4K recording.”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)