Hi @Boris P ,
After a migration task has completed, you can save it to be rerun at a later date, allowing you to copy only those new or updated files in the source location. If you wish to make changes to this setting, do so before your initial migration job is submitted.
Important:
We strongly recommend that you do not rename or move migrated files before the final migration has been completed. Doing so will result in files being overwritten.
Reference: https://learn.microsoft.com/en-us/sharepointmigration/spmt-create-task#incremental-migration
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