Move files from Account A to Account B 165 GB data

Share → “Add to my OneDrive” → Copy

• In Account A: Share a top‑folder (containing your 165 GB) with Account B (give edit permissions).
• In Account B: Log into OneDrive web, go to Shared → find the folder from Account A → choose “Add to my OneDrive” (so it appears under Account B’s OneDrive).
• Then from the B side: Copy the folder (within B’s OneDrive) into the correct location (so it becomes files owned by B).
• Once confirmed, you can delete the folder/contents from A, freeing up space.

Pros:

• Minimises upload from your local machine (because much of the transfer happens server‑side).
• Uses existing OneDrive sharing and copy features.

Cons:

• With many files / large files this can still be slow or unreliable (users report issues).
• Some metadata (like exact “modified by”) may not preserve perfectly.
• You’ll want to check thoroughly that all 200k files and folder structure copied correctly before deleting.

Use a third‑party cloud‑to‑cloud migration tool

How: Use a tool such as MultCloud or CBackup or similar, which connect both OneDrive accounts and move files server‑to‑server.

• Example: CBackup supports “Sync Public Cloud to Public Cloud” for OneDrive → OneDrive. cbackup.com
• Example: MultCloud supports “Cloud Transfer” between two OneDrive accounts. app.multcloud.com

Pros:

• Minimal local bandwidth usage (the data flows between cloud accounts).
• Often more controllable (can schedule, monitor transfers, resume/catch errors).
• You keep your machine free during the bulk transfer.

Cons:

• Some tools may cost money (or have free‐tier limitations).
• You must trust a third‑party with access to both accounts (check their security/privacy).
• Still may run into API limits or throttling by OneDrive if many files/large files are moved.
• Check whether they preserve all metadata or just the files.

Choose first (Share → Add to My OneDrive → Copy) because it uses mostly cloud transfer and avoids your upload bottleneck.

Before you delete anything from Account A:

• Verify the file count, folder structure, and total GB size in Account B equals what was in A.
• Spot‑check large video files to ensure they open OK.

If you encounter reliability issues (lots of errors, incomplete copy, very slow): switch to Method 2 — pick a reputable cloud‑migration service.

Once confirmed solidly, delete from Account A to free up space.

Important things to watch

• Ensure Account B has sufficient free space (≥ 165 GB) before starting.
• Large files (e.g., ISOs/videos) can be tricky in one go. Consider doing them in chunks (e.g., move videos folder first, then photos).
• Metadata: If you care about “Modified date” or version history, check the tool/method preserves them — many consumer migrations lose version history.
• Deletion: After transfer, you may need to empty the Recycle Bin in Account A to truly free up space.
• Time: Even cloud‑to‑cloud may take multiple hours, maybe a day or two depending on number of files and API throughput.
• Backup: Until you’re sure everything is transferred, keep the original safely in Account A (don’t delete prematurely).

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