I'm trying to copy a folder with files from a mounted volume to another mounted volume with a simple cp command.
The source folder Test only contains one 20MB .mp4 file.
cp -v -r -a /media/Online/Online/Projekte/Test /mnt/ArchivServer/Online/Projekte/
Everything looks fine, the folder structure looks good in the destination, but the files are there by name but all have 0 byte in size. It's actually 0 Byte since it can't be openend. There is also no error message.
Fairly new to Linux etc, what am I doing wrong? Unfortunately I can't find anything online about this

(source)and what was(destination)? Was(source)a file? A directory? Were its contents regular files? Symlinks? Something else? How large were the files in thesource?cpcommand produces.ls -lR /mnt/ArchivServer/Online/Projekte/Testwill show the reality.ls -ld /media/Online/Online/Projekte/Test/220608_Bloopers_Master.mp4 /mnt/ArchivServer/Online/Projekte/220608_Bloopers_Master.mp4. If you getNo such file or directorydouble-check the paths and file name (you might preferls -ld /media/Online/Online/Projekte/Test/*.mp4 /mnt/ArchivServer/Online/Projekte/*.mp4)