Fix S3 Multipart Upload Failures in RcloneView
S3 multipart uploads split large files into chunks for parallel transfer and resumability, but failures during the process can leave incomplete uploads, waste storage, and block transfers — here is how to fix them in RcloneView.
Amazon S3 and S3-compatible providers (Wasabi, Backblaze B2 S3, Cloudflare R2, MinIO, DigitalOcean Spaces) require multipart uploads for files larger than 5 GB and recommend them for files over 100 MB. The file is split into parts (default 5 MB to 5 GB each), uploaded in parallel, and assembled server-side. When this process fails partway through — due to network interruptions, timeouts, or misconfigured part sizes — the result is an incomplete upload that consumes storage but produces no usable object.

Manage & Sync All Clouds in One Place
RcloneView is a cross-platform GUI for rclone. Compare folders, transfer or sync files, and automate multi-cloud workflows with a clean, visual interface.
- One-click jobs: Copy · Sync · Compare
- Schedulers & history for reliable automation
- Works with Google Drive, OneDrive, Dropbox, S3, WebDAV, SFTP and more
Free core features. Plus automations available.