Media Device Copier

Media Device Copier is a Windows command-line utility for copying files to and from phones and other devices connected via MTP (Media Transfer Protocol).

Use it to:

• list connected devices
• list files on a device folder
• download from device to PC
• upload from PC to device

Table of contents

• Media Device Copier
  • Table of contents
  • Features
  • Requirements
  • Quick start
    • 1) Show help
    • 2) List devices
    • 3) List files in a device folder
    • 4) Download from device to PC
    • 5) Upload from PC to device
  • Commands
    • list-devices
    • list-files
    • download-files
    • upload-files
  • Filtering
  • Common behaviors and defaults
  • Troubleshooting
    • Device not found
    • Folder not found
    • Invalid regex
    • Unsupported file types
  • Architecture (resilient downloads)
  • License
  • Contributing

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Features

• List devices: show all connected MTP devices (list-devices, alias l).
• List files: list files in a device folder (list-files, alias lf), optionally filtered by regex and/or printed as full device paths.
• Upload files: copy files/folders from your PC to the device (upload-files, alias u).
• Download files: copy files/folders from the device to your PC (download-files, alias d).
• Skip existing files: avoid re-copying files (default behavior).
• Move files: use --move to delete the source after a successful transfer.
• Recursive copy: copy directory trees (--copy-recursive).
• Subfolder + file filtering: use regex patterns to include only matching subfolders and/or files.

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Requirements

• Windows (the app targets net10.0-windows).
• An MTP-capable device connected and unlocked (phones often require you to unlock and approve the connection).

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Quick start

1) Show help

MediaDeviceCopier.exe -h

2) List devices

MediaDeviceCopier.exe list-devices
# alias
MediaDeviceCopier.exe l

3) List files in a device folder

MediaDeviceCopier.exe list-files -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE"

# alias + filter to only jpeg files + print full device paths
MediaDeviceCopier.exe lf -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE" -f "\.(jpg|jpeg)$" --full-path

4) Download from device to PC

MediaDeviceCopier.exe download-files -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE" -t "D:\Photos" -r

5) Upload from PC to device

MediaDeviceCopier.exe upload-files -n "Android Device" -s "C:\Documents" -t "Internal Storage\Documents" -r -f "\.pdf$"

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Commands

list-devices

Lists all available MTP devices.

• Command: list-devices
• Alias: l

Example:

MediaDeviceCopier.exe list-devices

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list-files

Lists files in a device folder.

• Command: list-files
• Alias: lf

Options:

• -n, --device-name (required): the MTP device name.
• -s, --source-folder (required): the device folder to list.
• -f, --filter-files (optional): .NET regex to filter by file name.
• --full-path (optional): print full device paths instead of just file names.

Usage:

MediaDeviceCopier.exe list-files -n "<Device>" -s "<DeviceFolder>" [-f "<regex>"] [--full-path]

Examples:

# List all files in a device folder
MediaDeviceCopier.exe list-files -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE"

# List only JPEG files and print full device paths
MediaDeviceCopier.exe lf -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE" -f "\.(jpg|jpeg)$" --full-path

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download-files

Downloads files from an MTP device folder to a Windows folder.

• Command: download-files
• Alias: d

Required options:

• -n, --device-name: the MTP device name.
• -s, --source-folder: the device folder to copy from.
• -t, --target-folder: the Windows folder to copy into.

Common optional options:

• -se, --skip-existing [true|false]: skip files already at the destination (default: true). Pass false to overwrite existing files.
• -r, --copy-recursive [true|false]: recurse into subfolders (default: false). The flag alone (-r) implies true.
• -mv, --move: delete source after successful transfer.
• -sf, --filter-subfolders: .NET regex filter for subfolder names (used during recursion).
• -f, --filter-files: .NET regex filter for file names.

Examples:

# Copy pictures recursively and skip already-copied images
MediaDeviceCopier.exe download-files -n "Apple iPhone" -s "Internal Storage" -t "D:\MyPictureFolder" -r

# Move (download then delete from device) all videos after archiving
MediaDeviceCopier.exe download-files -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE" -t "D:\Archive" -r --move

# Copy only MP4 files from a flat folder (non-recursive)
MediaDeviceCopier.exe download-files -n "Apple iPhone" -s "Internal Storage\DCIM\100APPLE" -t "D:\Videos" -f "\.mp4$"

# Recursive copy: only subfolders starting with 2025, only JPG/PNG files
MediaDeviceCopier.exe download-files -n "Apple iPhone" -s "Internal Storage" -t "D:\MyPictureFolder" -r -sf "^2025.*" -f "\.(jpg|png)$"

# Force overwrite existing files (disable skip-existing)
MediaDeviceCopier.exe download-files -n "Apple iPhone" -s "Internal Storage\DCIM" -t "D:\Photos" --skip-existing false

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upload-files

Uploads files from a Windows folder to an MTP device folder.

• Command: upload-files
• Alias: u

Required options:

• -n, --device-name: the MTP device name.
• -s, --source-folder: the Windows folder to copy from.
• -t, --target-folder: the device folder to copy into.

Common optional options:

• -se, --skip-existing [true|false]: skip files already at the destination (default: true). Pass false to overwrite existing files.
• -r, --copy-recursive [true|false]: recurse into subfolders (default: false). The flag alone (-r) implies true.
• -mv, --move: delete source after successful transfer.
• -sf, --filter-subfolders: .NET regex filter for subfolder names (used during recursion).
• -f, --filter-files: .NET regex filter for file names.

Examples:

# Upload only PDFs
MediaDeviceCopier.exe upload-files -n "Android Device" -s "C:\Documents" -t "Internal Storage\Documents" -r -f "\.pdf$"

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Filtering

The filtering system uses two independent regex patterns:

1. Subfolder filters (-sf, --filter-subfolders) are applied during folder recursion before descending into subfolders.
2. File filters (-f, --filter-files) are applied to the file list within each processed folder.

Notes:

• Regex syntax is standard .NET regular expressions.
• list-files filters by file name, not the full path.
• If no filters are specified, all folders/files are included.

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Common behaviors and defaults

• Device name discovery: run list-devices first to get the exact name to pass to -n.
• Defaults:
  • --skip-existing behaves as true when omitted.
  • --copy-recursive behaves as false when omitted.
  • --move behaves as false when omitted.
• Boolean options (--skip-existing, --copy-recursive): can be passed as a bare flag (-r = true) or with an explicit value (--skip-existing false).
• Folder creation:
  • On download, if the Windows target folder does not exist and --copy-recursive is enabled, the folder is created.
  • On upload, if the device target folder does not exist and --copy-recursive is enabled, the folder is created.
• Version:

MediaDeviceCopier.exe --version

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Troubleshooting

Device not found

If you see “Device not found”, run:

MediaDeviceCopier.exe list-devices

Then copy/paste the device name exactly into -n.

Folder not found

• If a device folder path is wrong, the command will fail.
• If a Windows folder path is wrong:
  • with --copy-recursive enabled, download may create missing target folders
  • otherwise the command exits

Invalid regex

If a filter regex is invalid, the CLI will reject it. Start simple and escape backslashes correctly in your shell.

Unsupported file types

Some device files may not be transferable via MTP; those are reported as skipped.

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Architecture (resilient downloads)

MTP transfers can fail for certain files due to device firmware quirks, timing issues, or protocol limitations. MediaDeviceCopier uses a multi-strategy download pipeline and detailed diagnostics to make downloads more resilient.

Implementation details are documented in ARCHITECTURE_MTP_STRATEGIES.md.

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License

MIT License. See LICENSE for details.

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Contributing

Contributions, issues, and feature requests are welcome!