是的,会占用你的内存。
Once a file is saved to your phone or tablet, the file is saved to your mobile device and you can even access the file if you are offline. To clear space for more files or if you no longer need the file on your device or in your Dropbox, you can delete the file manually.
错,只会缓存你的目录结构,浏览以前没有浏览过的文件还是要先下载的。浏览后该文件也会缓存,下次离线也能看了。这一点和evernote,快盘等软件手机客户端很像,主要目的是在省流量和离线浏览之间寻求一个平衡点。
是会缓存,但正因为这缓存,使得我把网盘加密了,但在手机里只要找到缓存文件,加密码简直是多余的。