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Read multiple files from disk
https://n8nworkflows.xyz/workflows/read-multiple-files-from-disk-578
# Read multiple files from disk
### 1. Workflow Overview
This workflow is designed to read multiple binary files from disk, specifically targeting all JPEG image files located in the `/data/lol/` directory. It serves as a companion example for the "Read Binary Files" node documentation, demonstrating how to trigger and process multiple files matching a given file path pattern.
Logical blocks included:
- **1.1 Manual Trigger**: Initiates the workflow execution on demand.
- **1.2 Binary File Reading**: Reads multiple files from a specified directory path pattern and outputs their binary content.
---
### 2. Block-by-Block Analysis
#### 1.1 Manual Trigger
- **Overview:**
This block provides a manual execution starting point for the workflow, allowing the user to trigger reading files at any time without external input.
- **Nodes Involved:**
- *On clicking 'execute'*
- **Node Details:**
- **Node Name:** On clicking 'execute'
- **Type:** Manual Trigger
- **Technical Role:** Entry point node that waits for a manual trigger to start the workflow.
- **Configuration Choices:** No parameters configured; default manual trigger behavior.
- **Key Expressions/Variables:** None.
- **Input Connections:** None (start node).
- **Output Connections:** Connected to *Read Binary Files* node.
- **Version Requirements:** Compatible with n8n version 0.100.0 and later where manual trigger is supported.
- **Potential Failures:** None typical; user must manually trigger.
- **Sub-workflow Reference:** None.
#### 1.2 Binary File Reading
- **Overview:**
This block reads all files matching the pattern `/data/lol/*.jpg` from the local filesystem, loading their binary content into the workflow for further processing.
- **Nodes Involved:**
- *Read Binary Files*
- **Node Details:**
- **Node Name:** Read Binary Files
- **Type:** Read Binary Files
- **Technical Role:** Reads multiple binary files from disk based on glob file selector input.
- **Configuration Choices:**
- *File Selector:* `/data/lol/*.jpg` - uses a glob pattern to select all JPG files in the specified directory.
- **Key Expressions/Variables:** None beyond the static file selector string.
- **Input Connections:** Receives trigger from the manual trigger node.
- **Output Connections:** None; terminal node in this workflow.
- **Version Requirements:** Requires n8n version 0.150.0 or later for glob pattern support in the Read Binary Files node.
- **Potential Failures:**
- Path does not exist or is inaccessible (permissions).
- No files matching pattern found (empty output).
- File read errors (locked files, corrupt files).
- **Sub-workflow Reference:** None.
---
### 3. Summary Table
| Node Name | Node Type | Functional Role | Input Node(s) | Output Node(s) | Sticky Note |
|---------------------|----------------------|-----------------------|----------------------|---------------------|--------------------------------------------|
| On clicking 'execute'| Manual Trigger | Workflow start trigger | None | Read Binary Files | |
| Read Binary Files | Read Binary Files | Reads multiple JPG files from disk | On clicking 'execute' | None | Companion workflow for Read Binary Files node docs |
---
### 4. Reproducing the Workflow from Scratch
1. **Create Manual Trigger Node**
- Name: `On clicking 'execute'`
- Type: `Manual Trigger`
- No parameters need to be set. This node will act as the starting point for manual execution.
2. **Create Read Binary Files Node**
- Name: `Read Binary Files`
- Type: `Read Binary Files`
- Configuration:
- Set *File Selector* to `/data/lol/*.jpg` to select all JPEG files in `/data/lol/` directory using a glob pattern.
- No credentials required since reading local disk files.
3. **Connect Nodes**
- Connect the output of `On clicking 'execute'` node to the input of the `Read Binary Files` node.
4. **Save and Execute Workflow**
- Save the workflow.
- Click "Execute Workflow" manually to trigger the file reading process.
---
### 5. General Notes & Resources
| Note Content | Context or Link |
|-----------------------------------------------------------------------------------------------------------|--------------------------------------------------------|
| This workflow is a companion example specifically for demonstrating the "Read Binary Files" node usage. | See official n8n documentation on the Read Binary Files node for more details. |
| Ensure the directory `/data/lol/` exists and contains `.jpg` files for this workflow to produce output. | Local disk prerequisite |
| Reading files requires proper file system permissions for the n8n process user. | Operating system file permissions |
---
This documentation enables advanced users and AI agents to understand, reproduce, and extend the workflow while anticipating typical failure modes and configuration needs.