# Attachments and supporting documents

The paper behind the entry lives in the software, next to the document it supports: the scan of your supplier's invoice, the signed delivery note, the contract behind a service. You attach it once, and it stays attached to that document.

## Attaching a file

Open the record of a **document** (quotation, invoice or credit note) or of a **received invoice**, and go down to the **Pièces jointes** (Attachments) box. Choose your file, then upload it.

Each attachment then shows its name, its size, the date it was uploaded and the person who posted it. Its name is a link: clicking it downloads the file again, exactly as it was uploaded.

## What can be uploaded

| What is accepted     | Extensions                          |
| -------------------- | ----------------------------------- |
| **Documents**        | `pdf`, `doc`, `docx`, `xls`, `xlsx` |
| **Images and scans** | `jpg`, `png`, `webp`, `tif`, `heic` |
| **Text files**       | `txt`, `csv`                        |

Each file goes up to **25 MiB**. The type is read in the bytes of the file rather than in its extension, so a photo that has been renamed is still a photo and arrives safely.

## Removing an attachment

The remove button, on the attachment's line, asks for confirmation then takes the file away and gives its size back to your account's storage. The document it was attached to does not move.

## Your storage

The box shows at all times what your account uses out of its allowance, for example `1.2 GB of 20 GB`. Storage belongs to the **account** and serves all of its companies.

It is opened and extended from your customer area **[my.simafri.com](https://my.simafri.com/)**, in blocks of **20 GB**.

## What protects your supporting documents

Your files are **encrypted under a key belonging to your account** before they are written, and they can only be read again with it. That key is what makes erasure real: at the end of the relationship it is destroyed, and copies kept anywhere become unreadable at once, for us as for anyone else.

A file always comes back to you as a **download**, served from the address that carries your session: it comes down onto your machine, where you open it with your own software.