Please see the attached picture. Under Workspace, you will see 'dev' folder, which in turn contains 3 sub folders. My notebook exists in one of the sub folder. But, 'os.listdir(''/dev/')' shows different list of directories/filenames instead of the 3 sub-folders I see in the picture. It looks like 'os.listdir' command is referring to a different 'dev' folder, but not the one under Workspace. Thanks.