Canon EOS 70D Instruction Manual page 160

Responding to Error Messages
Check if the folder number of the camera to receive data is
999 and the file number 9999.
Folder or file names cannot be created automatically. Replace the
card in the camera to receive data, then try sending the data again.
Is the card working properly?
Replace the card in the camera to receive data, then try sending
the data again.
103: Could not receive files
Is the camera to receive data ready to receive data?
Check the battery of the camera to receive data and connection
status, then try sending the data again.
104: Could not receive files. Card full
Does the card in the camera to receive data have sufficient space?
Check the card in the camera to receive data. Replace the card or
make sufficient space available, then try sending the data again.
105: Could not receive files. Card's write protect switch is
set to lock
Is the card in the camera to receive data locked?
Check the card in the camera to receive data. Release the lock,
then try sending the data again.
106: Could not receive files. Folder and file number have
reached maximum value
Check if the folder number of the camera to receive data is
999 and the file number 9999.
Folder or file names cannot be created automatically. Replace the
card in the camera to receive data, then try sending the data again.
107: Could not receive files. Card cannot be accessed
Is the card working properly?
Replace the card in the camera to receive data, then try sending
the data again.
160