https://proconnect.intuit.com/community/help-articles/help/exporting-depreciation-data-to-a-file/00/... 

You may want to mark each asset as 50% business use before creating the export. The problem with that is it will not do 50% on prior depreciation. Short answer, there is no really easy direct way to do this. You will need to manipulate data, but it is probably easiest to do it in the 1065, then export. That way you will have one file that can be imported to the two and they will both be the same. 

When in the depreciation screen. Ctrl ⬇️ will move you down to the next entry. Ctrl ⬆️ will move you up. Both put you are the same entry item you left, e.g. prior depreciation, Prior 179, etc.