In addition to Amna answer, I suggest u just to create a temporary cloud site and perform a test migration there. This way u will have a really close statimation of the process speed.
Further info at: https://www.atlassian.com/migration/cloud/guide/test/test-migration
adding to the great information given to make the process work (please absolutetely follow those advices) I'd suspect a small amout of data (14 Megabyte) to go through really fast.
I am wondering if the user base is large - in case this is the case, or, the data/instance is complex communication efforts might overrun the actual time needed to a migration.
However, please take you time to test and please also use the great documentation offered on Atlassian site:
...ustomers receive an estimated 155% ROI and total benefits/savings of $1.8M over three years! Check out the report and the rest of our newest resources below, as well as our tried and true that m...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events