# Case files

Open a case → **Case files**.

### Uploading

Three ways:
1. **Drag & drop** files or whole folders onto the file panel. A blue dashed "Drop files to
   upload" target appears. Dropping onto a folder uploads into that folder; dropping elsewhere
   uploads to the case root.
2. **"Upload"** button → **"Upload files"** (multi-file picker) or **"Upload folder"** (keeps
   the folder structure).

Supported types include **PDF, Word (.docx/.doc), Excel (.xlsx/.xls), images (JPEG/PNG/GIF/
WebP), and video (MP4/MOV/WebM/MPEG)**. Audio and plain-text/Markdown files are recognized and
shown with icons.

**Upload progress** shows up as rows right in the file list — each in-flight file shows a
percentage, and folders on the path to an upload auto-expand and show aggregate progress. When
an upload finishes, its placeholder becomes the real file row. Failed uploads are flagged so the
user can retry.

### Browsing files

Two view modes (toggle top-right):
- **List view** (default) — a hierarchical tree with **Name / Size / Modified** columns.
  Expand/collapse folders with the chevron; folders show a child count.
- **Grid view** — thumbnail tiles with breadcrumb navigation.

**Search** ("Search case files") flattens the tree to matching files by name while keeping the
folder context. Clear the search to return to the tree.

### Organizing files

- **New folder** — from a folder's **⋯** menu (or the toolbar). Names default to "New folder"
  if left blank.
- **Rename** — **⋯** → "Rename".
- **Move** — drag a file/folder onto a target folder (it highlights), or drag to the root; a
  folder's **⋯** also offers **"Move to root"**.
- **Delete** — **⋯** → "Delete", with a confirmation. For a **file**, an optional checkbox
  **"Also remove from Case Knowledge"** additionally strips that file's extracted findings from
  the case's AI knowledge; unchecked, the findings remain even after the file is gone. For a
  **folder**, delete removes the folder and everything inside it. Deletes can't be undone.

### Viewing / previewing a file

Click a file (or **⋯** → "Open") to open a resizable preview pane on the right. Behavior by type:

| Type | Viewer |
|---|---|
| **PDF** | Built-in viewer with zoom, fit-to-width, fullscreen, page-by-page rendering |
| **Images** | Inline, fit to the pane |
| **Video** | Player with play/pause, ±10s skip, scrubber, volume, fullscreen |
| **Word (.docx)** | Formatted preview; an **"Open in editor"** button converts it into an editable case document |
| **Excel (.xlsx)** | Sheets rendered as tables |
| **Text / Markdown** | Monospace text |
| **Anything else** | "This file type cannot be previewed" + a **Download** button |

The preview pane can be resized (drag the left edge) or maximized to fullscreen, and its width
is remembered. **Download** is available from the row's **⋯** menu and from the preview.