Here is the difference: Dropbox: you spend $9.99 no matter whether you use up the 1TB or not. Glacier: you spend $10.24 only if you use up the 1TB, of course

Here is the difference: Dropbox: you spend $9.99 no matter whether you use up the 1TB or not. Glacier: you spend $10.24 only if you use up the 1TB, of course there is extra cost on data transfer-in/out.