Sony FX 6 Quick Start Manual page 16

Recording Media: Codec Bit Rates
XAVC I files are easier to play back than XAVC L. However, older computers
may struggle with the XAVC I 4K higher frame rate bit rates.
XAVC I bit rates:
HD and 4K 24-30p:
HD and 4K 50-60p:
HD and 4K UHD 120 fps:
XAVC L bit rates:
4K UHD 24-30p XAVC L (8 bit): 150 Mbps
HD 24-30p:
240-300 Mbps
500-600 Mbps
1200 Mbps
50 Mbps or 35 Mbps options