Hi Anshal,
The quickest way is to use the Azure CLI and use the below command. You can use the Cloud Shell
at the top right of the Azure portal to perform this.
This will give you a total number of blobs. Also, if you remove the line "-query "length(@)" it will show the actual blob files details.
This method authenticates using Azure AD, so make sure you have at least the "Storage Blob data reader" role on the storage account, below performing the command
Hopefully this helps you
az storage blob list \
--account-name <storage account> \
--container-name <container> \
--query "length(@)" \
--output table \
--auth-mode login