Perform the following in the Azure Console:

1. Navigate to your storage account.
2. In the Settings section, click Migrate to ARM.
3. Click on Validate to determine migration feasibility.
4. If validation passes, click on Prepare to create a migrated storage account.
5. Type yes to confirm migration and click Commit to finish the migration.

References:

1. https://docs.microsoft.com/en-us/azure/virtual-machines/linux/migration-classic-resource-manager-cli