# `mix storehouse.copy`
[🔗](https://github.com/hattoriai/storehouse/blob/v0.2.0/lib/mix/tasks/storehouse.copy.ex#L1)

Copies the files of one store to another (`Storehouse.copy_prefix/2`),
with its progress: to move to another provider, fill a mirror
(`Storehouse.Mirror`), or bring a production account's files into
development.

    mix storehouse.copy --from MyApp.OldMedia --to MyApp.Media
    mix storehouse.copy --from MyApp.Media --to MyApp.DevMedia --prefix accounts/42/

Files the destination has already are skipped, so it can be stopped and
run again: it copies only what is missing.

## Options

  * `--from` and `--to` - the stores, by module.
  * `--prefix` - the keys to copy, by their start. The default is every
    file.
  * `--concurrency` - how many files are copied at once. The default
    is 4.
  * `--verify` - read both copies of a file to compare them, where the
    stores keep no checksum to compare (`Storehouse.copy/2`).

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*Consult [api-reference.md](api-reference.md) for complete listing*