| "--filesizemb" | "FILESIZEMB" | When greater than zero, size of file generated and uploaded. When zero, random images are used instead. (default 0) |
## Timing
Configuration: `purchases` controls the number of concurrently running storage requests.
Configuration: `contract-duration` controls the duration in minutes of each storage request.
Auto-client will create a new storage request every X minutes, where X is the contract duration divided by the number of purchases.
(Timing may start to vary when contracts fail or time out.)