@Yuvaraj Premium and GPv2 both are different type of account kind.
General purpose version 2 (GPv2) storage accounts: GPv2 storage accounts allow you to deploy Azure file shares on standard/hard disk-based (HDD-based) hardware. In addition to storing Azure file shares, GPv2 storage accounts can store other storage resources such as blob containers, queues, or tables. File shares can be deployed into the transaction optimized (default), hot, or cool tiers.
FileStorage storage accounts: FileStorage storage accounts allow you to deploy Azure file shares on premium/solid-state disk-based (SSD-based) hardware. FileStorage accounts can only be used to store Azure file shares; no other storage resources (blob containers, queues, tables, etc.) can be deployed in a FileStorage account.
Please let us know if you have any further queries. I’m happy to assist you further.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Please do not forget to "” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.