Transfer Data s7 to s9

Hello,

Just preordered the S9; will be upgrading from S7.

Some of my apps and data are on a SD Card. I plan on using Smart Switch to transfer from the S7 to S9. Do I leave the SD Card in the S7 before using Smart Switch or do I install the SD Card in the S9 and then perform Smart Switch?

Thank you,
Jeff

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