To simplify the process of migrating devices, assets and parts form one location to another you can use the "Transfer Between Location" option under:

Tools > Templates & Bulk Operation > Transfer Between Locations

You can indicate the transfer name, select multiple devices, assets etc and the transfer location.

For more detailed information on this you can refer to this URL:

https://docs.device42.com/tools/transferring-devices-assets-and-parts-to-other-data-centers/