@rba76​  Make sure helloworld.txt file exists in the container1 folder

I'm able to view the text file using the same commands as follows:

Mount Blob Storage:

dbutils.fs.mount(
  source = "wasbs://sampledata@azure.blob.core.windows.net/Azure",
  mount_point = "/mnt/chepra",
  extra_configs = {"fs.azure.sas.sampledata.azure.blob.core.windows.net":dbutils.secrets.get(scope = "azurestorage", key = "azurestoragekey")})

Access files in your container as if they were local files, for example:

df = spark.read.text("/mnt/chepra/systeminfo.txt")
df.show()

Hope this helps.