05-07-2018 10:37 AM
Do the easy stuff first. New SD card. Reset camera ot defaults. Fully charge the battery.
05-07-2018 05:59 PM
Are you shooting rapidly ... perhaps using continuous burst mode to blast through several frames quickly??
The camera has an internal memory buffer. When you take a shot, the captured image is first transferred to the internal memory buffer (this is not permanent storage) and this allows the camera to take the next image. In the meantime, it saves the image from the internal memory to the memory card (but this is a slower process and depends on the speed of the card.)
If you take several shots in rapid succession, the buffer can fill up. When that happens you wont be able to take another shot until the camera has time to save at least one photo to the memory card (and that clears enough space so it can take one more photo).
There is a red light that indicates the camera is actively using the memory card (e.g. saving data).
There are other reasons you can see the "busy" message... e.g. camera attempting to achieve focus is one reasons; when I connect my camera to do remote "tethered" shooting (using the computer to control the camera) that also usually displays the "busy" message on the camera.
If it's not the memory card, then we'd probably need more info about how you are using the camera (mode, settings, etc.)
05-08-2018 04:24 AM
This can happen when I’ve just picked the camera up.
Can you update the camera
Sounds like a SD card issue to me. Take the card out and turn it on. Disable all of the noise reduction settings: i.e. long exposure noise reduction, high ISO noise reduction, etc.
Stick to full size SD cards, 32GB or smaller. Always format a new card in the camera. They do not come preformatted.
05-08-2018 04:07 PM
"...can you tell me how to do ..."
I can tell you to contact Canon at 1 (800) 652-2666. I think that is where you need to query.