About License questions

If I buy " Lifetime License" with 89.95 ,
and add $69.95 to get a “Add more device” option,

then I could use in my home PC, office PC, notebooks, … to 10 devices ?

or I should pay 69.95 for each adding device ??

You need to pay $69.96 for each device you want to run CloudSync simultaneously. If you do not need to use CloudSync on multiple devices simultaneously you don’t have to buy multiple device license. With 1 device license you can use CloudSync on multiple devices but not at the same time.