Yes, the Delkin Devices PRIME SD V60 128GB is compatible with the Sony A7 IV.
Delkin PRIME SD is a Video Speed Class V60 card (280/105 MB/s rated). Sony A7 IV's SD slot requires Video Speed Class V90 or higher for its top XAVC S-I 4K (600Mbps) mode per Sony's own Help Guide -- V60 does not meet that. Works for lower-bitrate SD-recordable modes.
Limitation
Does not meet Sony A7 IV's top XAVC S-I 4K (600Mbps) SD-slot mode -- requires Video Speed Class V90, this card is V60. Works for lower-bitrate SD-recordable modes.
“XAVC S-I 4K 600Mbps CFexpress Type A memory card (VPG200 or higher) SDXC V90 or higher”
“PRIME Preferred by Professionals 128GB – 1TB 280 MB/s Read 150 MB/s Write ( 128GB: 105 MB/s) Class 10 / U3 / V60 Lifetime Warranty Ideal for professional photographers & videographers, the PRIME SD card supports various simultaneous capture modes, such as video + still + GPS data.”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)