Yes, the SanDisk Extreme microSDXC UHS-I 128GB is compatible with the Sony A7C II.
SanDisk Extreme microSDXC UHS-I 128GB is V30 class. Meets the floor for: 4K30 (30 MB/s floor). Does not meet the floor for: 4K60 (60 MB/s floor). (Peak write 130 MB/s is not evidence of sustained performance; the V30 class rating above decides this.)
Limitation
Cannot record 4K60 -- this camera's spec requires Video Speed Class V60, this card is V30 class. The bundled microSD adapter provides physical fit only; it does not change the card's class rating. Works for 4K30 modes.
“For S&Q Motion shooting (When [ Proxy Recording] is set to [Off] ) File formats and compatible memory cards are as follows. File Format Maximum recordable bit rate when recording Supported memory card XAVC HS 4K 250Mbps SDXC V60 or higher”
Last verified:
High confidence