Data upgrade from Dynamic NAV 2009R2 to Business Central 21

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Currently I have database with 80GB data running on Microsoft Dynamics NAV 2009R2 and planned to perform data conversion to Business central v21.
What is total time duration for perform data migration with path: NAV 2009R2 -> NAV 2015 -> BC v14 -> BC v21 if I following upgrade steps in url below.

https://cloudblogs.microsoft.com/dynamics365/no-audience/2015/02/23/upgrading-from-microsoft-dynamics-nav-2009-r2-or-microsoft-dynamics-nav-2009-sp1-to-microsoft-dynamics-nav-2015/
https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/upgrade/upgrade-paths
https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/upgrade/upgrade-technical-upgrade-v21

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YUN ZHU 99,086 Super User 2026 Season 1 on at

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Hi, I think this is difficult to estimate. It has something to do with the type of data, the performance of the running server, and the amount of customized data.
I suggest you test it with an existing database first, it's the most accurate.

In addition, there is a similar question below, I hope it can give you some tips.

https://community.dynamics.com/forums/thread/details/?threadid=2760a8fe-02c0-4898-8a1b-1327c9fc3f3c

Thanks.

ZHU

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