Hello,
yes ctrlX has no Windows file system but there is a way to add files on the ctrlX via browser. You need to put files into plc/run/linux-gcc-x64/data once you've done this you should be able to access these files from the plc. To access file from PLC you only need to write filename with extension. E.g. Testfile.txt (you don't write the whole path to the file. Everything is relativ to the data folder)
1. Open file browser on ctrlX webserver
2. Go to PLC Runtime and optional engineering data
3. Navigate to plc/run/linux-gcc-x64/data
4. Upload your file
PS: I don't have a Zebra print available for testing. So I can't perform any tests.
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