With Amazon FSx for Windows File Server, you pay only for the resources you use. There are no minimum fees or set-up charges. You pay for the storage and throughput capacity that you specify for your file system, and for any backups of your file system. Standard data transfer fees apply for transferring data between AWS Availability Zones (Multi-AZ replication and inter-AZ access).
Storage capacity: You pay for the average amount of storage provisioned for your file systems per month, measured in gigabyte-months "GB-Months", as shown in the pricing example.
Throughput capacity: You pay for the average throughput capacity you’ve provisioned for your file systems per month, measured in “MBps-months”.
Backups: Backups–both automatic and user-initiated–incur backup storage charges. Backups are incremental, which means that only the changes after your most recent backup are saved, so you save on storage costs by not duplicating data. You pay for the average amount of backup storage per month, measured in “GB-months”.
Pricing per region
Assume your file system is located in the US East (N. Virginia) region, has been provisioned with 1,024 GB (1 TB) of storage capacity, and 8 MBps of throughput capacity. Assume you have an average backup storage of 500 GB during the month.