Canon EOS RP Instruction Manual page 326

Setting Image Quality
Maximum Burst for Continuous Shooting
If the maximum burst is displayed as "99", it indicates that you can shoot 99
o
or more shots continuously. The value starts decreasing once it reaches 98
or less. [BUSY] display indicates that internal memory is full and shooting
will stop temporarily. If you stop continuous shooting, the maximum burst will
increase. After all the captured images are written to the card, you can resume
continuous shooting and shoot up to the maximum burst listed in the table on
= 583.
118
The approximate maximum burst is shown
on the shooting screen and in the lower
right of the viewfinder.