Yes, the Panasonic LUMIX GH7 is compatible with the SanDisk Extreme microSDXC UHS-I 128GB.
Panasonic Lumix GH7 has a full-size SD card slot. SanDisk Extreme microSDXC UHS-I 128GB (V30-rated, real write speed 130 MB/s) fits via the bundled microSD-to-SD adapter and clears this camera's standard recording modes, but does not meet the Video Speed Class V90 rating GH7's own manual requires for its 600 Mbps top-tier SD-card mode -- V30 certification doesn't guarantee V90-tier sustained performance regardless of this card's peak MB/s benchmark.
Limitation
Cannot record SD-slot video at the 600 Mbps tier -- Panasonic's own manual requires a Video Speed Class 90 (V90) card for that bitrate; this card is V30 class. The bundled microSD adapter provides physical fit only, not a class upgrade. Works for all lower-bitrate SD-slot modes.
“The SD memory card cannot record videos with bitrates exceeding 600Mbps. Use a CFexpress card or External SSD to record videos with bitrates above 600Mbps. Also, use a video speed class 90 (V90) SD Memory card to record videos with bitrates 600Mbps.”
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