Yes. A practical approach is to use a cloud backup service that watches selected folders and uploads changes automatically in the background. That gives you a Dropbox-like workflow for .NEF files without needing to manually copy files each time.

Based on the answers, services commonly used for this include Mozy, Carbonite, Backblaze, CrashPlan, Dropbox, and SugarSync. In general, these let you choose one or more folders, then they scan for changes and upload new or modified files automatically.

A few points to keep in mind:

• .NEF files are just files, so any normal backup/sync service can store them.
• Ease of restoring files varies by service, so check each provider’s restore/download process.
• Pricing and storage limits differ, so compare current plans if low cost is your priority.
• For photo libraries, backing up the folders that contain your originals is usually the simplest setup.

So yes: automatic cloud backup for .NEF files on both Mac and Windows is available, and the best choice depends mostly on current pricing, storage limits, and restore experience.