Canon EOS 77D Mode D'emploi De Base page 172

Downloading Images to a Computer
Downloading Images with a Card Reader
You can use a card reader to download images to a computer.
When downloading images from the camera to a computer with a card
reader without using EOS software, copy the DCIM folder on the card to the
computer.
170
Install the software
1
Insert the card into the card
2
reader.
Use Digital Photo Professional to
3
download the images.
Refer to the Digital Photo

Professional Instruction Manual.
.
(p.167)