> For the complete documentation index, see [llms.txt](https://moverdocs.files.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://moverdocs.files.com/migrations/dry-runs.md).

# Dry Runs

A Dry Run is a discovery scan that previews a migration without moving any data. It walks the source and destination, reports file and folder counts and the total size of the data, and surfaces issues like excluded patterns or unsupported filenames. Dry Runs do not count against your [usage pack](/billing.md).

Run a Dry Run before every live migration. Use the *Status* filter to focus on specific results, filtering by *Success*, *Skipped*, or *Failed*. The results validate that filters work as intended, identify errors that would otherwise stall the migration mid-flight, and give you the data size you need to choose the right [usage pack](/billing.md#usage-packs). Picking a pack without knowing the actual size of the dataset risks hitting a capacity limit partway through the transfer.