The correct options are Require Entra ID authentication for Azure Files, Configure the storage account firewall to allow requests only from specific IP ranges, and Use a virtual network with private endpoints so only traffic from the VNet can reach the storage.

Require Entra ID authentication for Azure Files enforces identity based access so users and services must present Azure AD credentials and you can apply Azure RBAC and directory based controls to limit who can mount or access file shares.

Configure the storage account firewall to allow requests only from specific IP ranges lets you create network rules that permit only trusted client IP addresses or service tags and you can block public network access to reduce exposure.

Use a virtual network with private endpoints so only traffic from the VNet can reach the storage assigns a private IP in your VNet for the storage account so traffic flows over the Azure backbone and you can combine this with firewall and identity controls for strong isolation.

Move the storage account to a different subscription will not by itself restrict network or identity access because subscription boundaries govern management and billing scope and do not change the storage account network or authentication configuration.

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