What program is behind “Node.js JavaScript Runtime” accessing my files (downloading cloud OneDrive files)?

(Note: This is probably not connected to OneDrive, but OneDrive is letting me see my files are being accessed. It may help others search this same issue if it happens to them.)

Every reboot of my computer, this file is accessed by “Node.js JavaScript Runtime” — which causes OneDrive to download it. This is all happening without my instruction:

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It is a backup file that is over 1 GB in size. I deleted it to make it stop, but it just downloaded the next (1 GB backup file) in the same folder. I keep these backup files on the cloud only.

What I have done:

I have done a virus scan, quick and full. I am about to do an offline scan. APPEND: The quick, full, and offline scans did not find anything malicious.

What I am looking for:

I am looking for ideas of what might be causing this. Also, how do I discern which program is causing this? And why?

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