> For the complete documentation index, see [llms.txt](https://docs.plenit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.plenit.com/docs-en/productos/migrations/concepts/transfer.md).
# Transfer Modes
The transfer mode defines how the disk travels from your source to Plenit. The wizard generates the upload credentials or uses the URL you provide, depending on the mode.
### How to choose
* **SFTP** is the general mode: it works from on-premises or the cloud, on any operating system, using a compatible client. It's what you use when you export the disk to a file and upload it (or map the SFTP as a drive to write the disk directly onto it).
* **Download by URL** is the most agile option when the disk is already published as a link, for example in an Amazon S3 bucket or an Azure Storage Account: Plenit downloads it without you having to upload it yourself.
* **Web upload** is for files that you upload directly from the browser.
* **Acronis Agent** covers dumps from Acronis backup software through its cloud method.
> #### 🚧 If you import by URL
>
> The link must remain active and accessible for the duration of the transfer, because Plenit is the one downloading the disk.
>
> And for some sources (such as AWS), URL import is launched from the same machine where you performed the operation.
### Next steps
* Review how everything fits together in [The process.](/docs-en/productos/migrations/concepts/the-process.md)
* Choose the guide for the source you are going to migrate in the [How-to.](/docs-en/productos/migrations/how-to.md)
* If you prefer guidance, see [How to request an assisted migration.](/docs-en/productos/migrations/how-to/como-solicitar-ayuda-para-migrar-un-servidor-a-cloud.md)
---
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