Yes, the Canon EOS R50 works with the SanDisk Extreme microSDXC UHS-I 128GB — with conditions (see below).
SanDisk Extreme microSDXC UHS-I 128GB is V30 class. Meets the floor for: 4K30 (30 MB/s floor). (Peak write 130 MB/s is not evidence of sustained performance; the V30 class rating above decides this.)
Conditions for compatibility
requires the bundled microSD-to-SD adapter (included with the card); clears every recording mode this camera supports (every mode this camera's own card-performance table lists -- the highest, 4K UHD IPB Standard, itself only requires UHS Speed Class 3 or higher).
“s (HDR PQ) NTSC PAL 4K UHD 29.97 23.98 25.00 IPB (Standard) UHS Speed Class 3 or higher IPB (Light) SD Speed Class 10 or higher UHS Speed Class 3 or higher Full HD 119.88 100.00 IPB (Standard) UHS Spe”
Last verified:
High confidence