Hello @Priya N. Bidkar - Thanks for reaching out, and posting on the MS Q&A.
The step for transferring the files will be pretty easily accomplished using the following two connectors:
As for the step for preserving existing security roles & privileges, could you provide more details? Are you looking to preserve the existing "Sharing & permissions" constructs (associated with folder/files on Sharepoint) to be converted to a combination of RBAC/ABAC/ACL rules on the ADLS side?