Account Migration: How do I roll back changes to date modified on transferred files

[Hazeo]

I am migrating from a school account to a new workplace account I've set up. I wanted to preserve that date modified/created data, so I first tried using Google's account transfer option Google Takeout. It crashed part way through.

I now know that while I can't preserve anything transferring directly between accounts, if I download multiple files directly or use the data export tool the date modified would be preserved. However, the account transfer I initiated updated the data modified information on most of my files because it will update if the sharing permissions on a file change and that's what the transfer tool did.

I want to restore to the modified date prior to initiating the transfer for all my file, so what are my options? I noticed that if I open a file and look at the document details or the edit history, the last modification dates are correct, so is there any way to export that info en masse? 

[christiannewman]

Depending on the volume of files and and complexity of the folder structures involved, there may be a way to move most files, rather than copy them, using a shared drive owned by the destination account as a half-step. 

How many users are you migrating?