Canon EOS 5D Mark IV Instruction Manual page 79

Importing a Root Certificate for FTPS
If the FTP mode is set to [FTPS] when configuring the connection
settings, the same root certificate as the FTP server must be imported
to the camera. Insert a card containing the root certificate file into the
camera, then perform the following operation.
Only a root certificate whose file name is "root.cer", "root.crt", or

"root.pem" (case insensitive) can be imported to the camera.
Only one root certificate file can be imported to the camera. Import is

not possible if the card contains two or more root certificates.
Configuring FTP Server Connection Settings
Select [Communication settings].
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Under the [54] tab, select

[Communication settings], then
press <0>.
Select [FTP transfer settings].
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