Skip to main content


FlexFS billing is an intentionally uncomplicated process whereby you pay only for the data you store in flexFS. The only variable that applies is your cost / GB-month rate Rm.

Statistics gathering

Summary statistics for each flexFS volume are reported to Paradigm4 at least hourly. From those, we may see:

example-volume: Bh bytes @ 2024-01-01 01:00


  • Bh = number of bytes stored in flexFS that hour

Hourly rate calculation

An effective hourly rate is calculated as follows:

Rh = Rm / Hm


  • Rh = hourly rate
  • Rm = monthly rate (contracted)
  • Hm = hours in the billing month

Hourly cost calculation

For each hour, the average reported size of the volume in bytes is converted to GB and multiplied by the hourly rate.

Ch = (Bh / 1,073,741,824) * Rh


  • Ch = hourly cost
  • 1 GB = 1 GiB = 1,073,741,824 bytes (standard practice in cloud storage calculations)
  • Rh = hourly rate (calculated earlier)

Monthly cost calculation

We simply add up the calculated hourly costs, Ch, for the month to determine the total cost for the month.

Quarterly invoicing

For most customers, we send quarterly invoices on Net 30 payment terms.