Yes, the Delkin Devices PRIME SD V60 128GB is compatible with the Sony Alpha A9 III.
Delkin Devices PRIME SD V60 128GB is V60 class. Clears: XAVC S HD (100 Mbps, requires U3); XAVC HS 4K (280 Mbps, requires V60); XAVC S 4K (280 Mbps, requires V60). Does not meet the floor for: XAVC S-I 4K (600 Mbps, requires V90); XAVC S-I HD (222 Mbps, requires V90).
Limitation
Card's speed class is a fixed ceiling -- cannot reach: XAVC S-I 4K (600 Mbps, requires V90); XAVC S-I HD (222 Mbps, requires V90). No adapter or setting changes this.
“This camera supports CFexpress Type A memory cards and SD memory cards (UHS-I, UHS-II compatible).”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)