Yes — Claude Desktop can read, edit, and create files on your computer. The built-in way is Cowork, included in every paid Claude plan on macOS and Windows: you connect a folder, and Claude works with the files inside it, live on disk.
This post covers the desktop app specifically — how to connect a folder, what Claude can then do, and where the boundaries are. If you’re weighing the desktop app against Claude Code, Projects uploads, or an MCP setup, the five-method comparison is the broader guide.
Disclosure: I build StashBase, the indexed-library option mentioned at the end. Everything before that is official Anthropic functionality. Current as of August 2026.
How to give Claude Desktop access to a folder
- Open the Claude desktop app. Folder access is a desktop-app capability — Cowork sessions started on web or mobile can reach your files only through the desktop app while it’s open on your computer.
- Select Cowork in the message box, then connect the folder you want Claude to work in.
- Describe the task and pick a permission mode. Claude can now read, edit, and create files in that folder.
What the permission modes mean
Cowork has three modes controlling how much Claude asks before acting:
- Manual — Claude pauses and requests approval for each action.
- Auto — read-only actions run automatically; writes and deletes are reviewed.
- Skip — no automatic checks or pauses.
Start with Manual or Auto on a folder that matters. Whatever the mode, access stays bounded: Claude can only read and write inside folders you’ve connected, nothing outside them.
What “local” does and doesn’t mean
Your files stay in place on disk — there’s no uploading or re-downloading, and edits land directly in the folder. But the content Claude reads is still processed by the model, like anything you’d paste into a chat. “Local” here means the files stay put, not that their contents never leave your machine.
Beyond Cowork: MCP servers in Claude Desktop
Claude Desktop is also an MCP client, so it can take desktop extensions and connectors that grant file capabilities beyond folder browsing — for example the reference filesystem MCP server for raw file operations over allowed directories.
Where this matters most is retrieval. Cowork explores a folder the way you would — listing directories, opening files — which works well until the folder is large, or the content lives in PDFs, scans, and recordings with no text to skim. An indexed library like StashBase takes that case: it converts PDFs, DOCX files, images, and audio/video into searchable text, then exposes keyword and semantic search to Claude Desktop over MCP. Setup takes a few minutes — here’s the step-by-step guide.
The short version
- Can Claude Desktop access local files? Yes — connect a folder in Cowork, on any paid plan.
- Can it edit and create files? Yes, within connected folders, governed by the permission mode you choose.
- Can it search a large or mixed-format folder well? Not by itself — folder access is browsing, not retrieval. That’s what an indexed library over MCP adds.