Transfer files from MEGA to OneDrive

Server to server, without downloading anything to your computer.

How it works

Connect both accounts once. ShiftMyData then talks to MEGA and OneDrive directly and streams the files between them in memory — nothing is written to our disks, and nothing travels down to your machine and back up again. The job runs on a worker, so closing the tab does not stop it.

Will every file be verified?

MEGA exposes no checksum through its API, so files are compared on size and modification time. That is a limit of MEGA rather than of the transfer, and it applies whichever tool you use.

Before you start

The largest single file OneDrive accepts is 250 GB. A bigger one is reported as failed and the rest of the transfer carries on.
MEGA treats Report.pdf and report.pdf as two files; OneDrive treats them as one. Where both exist in one folder, only one arrives, so rename one first.
MEGA allows two files with exactly the same name in one folder, and OneDrive does not. Only one of each such pair is copied; rename duplicates before you start if you need both.
OneDrive refuses the characters " * : < > ? / \ | in a name, a name that starts or ends with a space, and names Windows reserves such as CON or desktop.ini. Such names are written with look-alike Unicode characters instead of failing, and turn back into the originals if the files are later copied out through ShiftMyData.
A transfer copies each file's current content, name and modification time; sharing and version history stay behind on MEGA. Business migration carries them where both sides support them.

Sources: rclone.org · support.microsoft.com

Worth knowing about MEGA

MEGA exposes no checksum through its API and rate-limits free accounts aggressively. Transfers are compared on size and modification time, and a large move from a free account will be throttled by MEGA rather than by us.

Worth knowing about OneDrive

OneDrive's only checksum is QuickXorHash, which Microsoft invented and nobody else implements. It verifies perfectly against another OneDrive and is useless against anything else.

Steps

On the Clouds screen, add MEGA: enter your MEGA email and password.
Add OneDrive the same way: sign in with Microsoft and allow access.
Pick the source folder in the left pane and the destination folder in the right.
Choose a mode — copy, mirror, move, or two-way — and start the transfer.
Leave it. Progress is on the Jobs screen, and a webhook can tell you when it ends.

Questions

Do I have to download my files from MEGA first?

No. The transfer is streamed from MEGA to OneDrive on our servers, so nothing is written to your machine and your home upload speed is not the limit.

What happens if I close my laptop?

The job keeps running. It is queued on a worker rather than in your browser, and the progress is there when you come back.

How do I know every file arrived?