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iCloudを使わずにiPhoneの写真をバックアップする方法(2026年版)

カメラロールを守る方法はiCloudだけではありません。Mac/PCへのバックアップから、Wi-Fi経由の自動クラウドバックアップまで、2026年の現実的な選択肢を容量計算と注意点つきで解説します。

2026年8月24日 約8分
iCloudの代わりに暗号化クラウドへバックアップされるiPhone写真ライブラリのイラスト。

Every iPhone nudges you toward the same answer: your photos fill up, Apple offers 5 GB for free, and the path of least resistance is an iCloud+ subscription. That's a fine product — but it is not the only way to keep a camera roll safe, and for a lot of people it is not the best one. Maybe you want your photos out of the Apple account that controls everything else in your life. Maybe you share storage with family on Android and Windows devices. Maybe you simply want a second, independent copy — which every real backup strategy requires anyway.

The rule that matters is 3-2-1: three copies of your photos, on two different kinds of storage, one of them off-site. iCloud alone is one copy in one vendor's basket. Everything below is about adding an independent one.

First, the storage math

A modern iPhone photo (HEIC) averages 2–4 MB; a ProRAW shot is 25–75 MB; a minute of 4K/60 video is roughly 400 MB. A typical camera roll of 10,000 photos and 200 short videos lands somewhere between 60 and 120 GB. Know your own number before choosing a destination: Settings → General → iPhone Storage → Photos. If you want to project forward, our free storage needs calculator does the arithmetic for photos, video, and everything else.

Option 1: Back up to a Mac or PC (free, manual)

The oldest method still works. Plug the iPhone into a computer, approve the "Trust this computer" prompt, and import: on a Mac, the Photos app or the barebones Image Capture; on Windows 10/11, the Photos app or a straight copy from the DCIM folder in File Explorer.

  • Cost: free, if the computer has the disk space.
  • Effort: manual. The backup is only as fresh as your last sync session.
  • Gotcha #1: if iCloud Photos is on with "Optimize iPhone Storage", the full-resolution originals may not be on the phone at all — the import silently grabs whatever is local.
  • Gotcha #2: Windows may need the HEVC/HEIC extensions to preview HEIC files, and long videos occasionally stall over USB.

Option 2: External drive or NAS (one-time cost, hands-on)

Since iOS 13 the Files app mounts USB-C drives directly, so you can copy from Photos to a drive with no computer in the middle. A NAS (Synology, QNAP, TrueNAS) turns that into a network destination with its own mobile apps for automatic upload.

  • Cost: a 1 TB SSD is a one-time ~$60–100; a two-bay NAS starts around $300 before disks.
  • Strength: your data never leaves hardware you own.
  • Weakness: a drive in the same house as the phone is not an off-site copy. Fire, flood, and burglary take both. NAS auto-upload apps also pause aggressively in the background on iOS.

Option 3: Automatic cloud backup (set-and-forget, off-site)

This is the category iCloud lives in — and so do its alternatives. A cloud backup app watches the camera roll and uploads new photos and videos in the background, giving you the off-site copy in 3-2-1 without thinking about it. The differences that matter in 2026:

  • Free tier that actually fits a camera roll. Apple gives 5 GB, Google 15 GB shared with Gmail. VirtualDrive's free plan is 20 GB — enough for roughly 6,000–8,000 HEIC photos.
  • Wi-Fi-only and battery rules. Backup should default to Wi-Fi so it never touches your data plan, and resume cleanly after iOS suspends it.
  • Original quality, original format. Some services transcode or "optimize" videos on free tiers. A backup that recompresses your files is not a backup.
  • Cross-platform access. The point of leaving iCloud is reaching the same photos from a browser, an Android phone, or a Windows PC without friction.
  • Privacy terms. Read the AI clause. VirtualDrive encrypts files with AES-256 and never trains AI on them; not every service can say both.

The VirtualDrive iOS app does exactly this: Camera Backup uploads new photos and videos over Wi-Fi in the background, keeps originals untouched, and shows a per-file sync status so you can verify the copy exists before you free up space on the phone. We wrote up how the engine survives iOS background limits in Camera Backup under the hood.

Option 4: The hybrid that most people should run

These options compose. The setup we recommend to friends and family:

  • Automatic cloud backup as the always-on, off-site copy.
  • A yearly import to a computer or external drive as the second medium — an hour of effort each January.
  • Only then delete from the phone to free space, once both copies confirm the files.
That is a full 3-2-1: phone + drive + cloud, two media, one off-site — without an iCloud subscription and without your photo library being tied to a single vendor account.

Turning iCloud Photos off safely

If you are leaving iCloud Photos, do it in this order. First make sure your new backup is complete — every photo present at original quality in the new location. If "Optimize iPhone Storage" was on, download the originals first (Settings → Photos → Download and Keep Originals, then wait — this can take days for a big library). Only then turn off iCloud Photos, and keep the iCloud copies for the 30-day grace period before letting the subscription lapse.

Common questions

Does backing up to the cloud use my mobile data? Not if the app is set to Wi-Fi-only — VirtualDrive's Camera Backup is Wi-Fi-only by default, with an explicit opt-in for cellular.

What about Live Photos and HEIC? A proper backup stores the original file, motion component and all. If you need JPEGs for an old Windows machine, convert at download time, not at backup time.

What does it cost when I outgrow 20 GB? VirtualDrive's paid plans start at $9.99/mo for 2 TB — enough for a decade of typical shooting — and photo-heavy users can compare plans against their real library size with the calculator above.