Excel Sheets! Where to Load for Members Access?

I have made some simple and sometimes a little more complex excel sheets through My IM life to help with calculations from simple ROI, CPM2CPC conversions, negative draw-down/profit calcs and some others.

One of the recent simple ones allowed me to see how running a campaigns negative to gather data and having only 1% of my targets profitable could really turn into a very alpha campaign that made a lot in a month (3days of losses and then 27 days profit)

Where is the best place to upload tho ...