Btw the dropbox thing that you said is untrue, u dont have to copy them to another folder simply go to dropbox.com and upload the pics, no need to copy them on your desktop. And once u do so, if you use dropbox for other things and its a neccesity to have it on your desktop simply right click, press on dropbox preferences and you can choose what you want and dont want to be downloaded on your laptop, simply uncheck the photos folder and ull just have it online rather on your desktop.

easy as pi
Sorry to tell that you are wrong - normal use of Dropbox requires you to copy whatever you want in their cloud to your special dropbox folder. If you use the online option you can choose files from anywhere yes, but it will not keep them in sync and there is an upload limit of
300MB (iPhoto library is one single container file).
Secondly, Dropbox is hugely expensive for the size I need.
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More exciting info from the absolutely helpful staff at Crashplan:
Asked them how to be sure I will not re-upload all my data when I move my media library to a Ubuntu based NAS computer running their software:
"You can add the NAS to your backup selection just as you did with the external drive. To avoid re-uploading any data, it's important to not remove the old location (external drive) just yet. CrashPlan will perform a scan and will pass over any files that it see have already been uploaded to our servers. Once your backup is at 100%, you can remove the old drive from your backup selection.
CrashPlan will always retain the newest version of a file, so if a file hasn't had any changes in a while, it will still remain in your archive. CrashPlan only removes older versions of files, and this is done according to your retention settings:
http://support.crashplan.com/doku.php/reference/version_retention_and_backup_frequency"
Also I found
this link about the subject.
They by mistake send me another mail that was actually not intended for me but still nice to know:
"Our goal for CrashPlan is to provide secure, reliable, unlimited backup at a great price. We do not throttle uploads or limit file sizes or types.
Like other services that share resources with a pool of users (i.e. cable internet; cellular data), CrashPlan's speed varies depending on the number of simultaneous users and what they are uploading and downloading at the time. Most users get speeds that completely meet their needs.
If you happen to have a very fast internet connection, it is unlikely that backups to CrashPlan Central will be able to match your upload limit. This is not a bug - it's the nature of a shared service which is designed to be affordable. We work to ensure that everyone gets sufficient bandwidth for uploads, and is able to get a reasonable speed.
We're continually monitoring usage across our data centers and we are strategically adding capacity (servers, storage and bandwidth) to our infrastructure to deliver optimum performance to all users."