# How to upload files

## CMMC Share Links — Multipart Upload Guide

### Overview

CMMC share links now accept uploads directly from FenixShare. Every transfer uses a hardened multipart pipeline built just for CMMC, so even large or sensitive files arrive intact without requiring the Windows agent.

### Who Can Upload

* Folder-based CMMC share links where you already hold edit rights.
* Primary users plus any invited collaborators who have been granted edit permission.
* Upload remains **multipart-only for CMMC** to meet the connector’s reliability and compliance requirements.

### How to Upload

1. Open the CMMC share link and choose `Upload`.
2. Select one or more files. FenixShare automatically slices them into encrypted chunks.
3. Track progress in the refreshed upload panel:
   * Real-time percentage for each part.
   * Clearly labeled states (Preparing → Uploading → Encrypting).
   * Inline error messaging if a chunk stalls.
4. When the upload completes, the file list refreshes.

### Why Multipart Matters

* Handles large transfers without timing out typical single-request limits.
* Recovers gracefully from unstable networks by retrying only failed parts.
* Validates every chunk before sealing the encrypted object in the CMMC vault.