When you create single-tenant Standard plan logic apps, you use your own Azure Storage account. This capability gives you more control and flexibility because you own the keys to your data. As a result, storage usage and costs are not abstracted, unlike multi-tenant Consumption plan logic apps. Your Azure bill will show storage as a separate cost for any single-tenant logic apps you have. Storage operations vary based on the trigger, actions, and payloads in a workflow. To help you estimate monthly storage costs, the Logic Apps Storage Calculator helps you calculate the number of operations per run and per month. You can then use these values in the Azure pricing calculator. To use this storage calculator, provide your workflow definition, which you can find in the 'workflow.json' file, and specify the estimated number of monthly runs. For queue and table operations, open Advanced Options, and specify the estimated number of 'For each' and 'Until' loop runs. For blob operations, select any actions that have payloads over 32 KB.
This tool provides estimates only; the actual number of operations and your actual spend may vary.