Grab the brand new ownCloud Desktop Client 2.3.0 for either Mac, Windows or Linux (or build it from source)!

It features many improvements under the hood as decreased memory (up to 300% !) and CPU usage as well as better time/bandwidth estimation during sync. In the frontend you might notice two big improvements concerning the sync of external storages: You can now easily deny or allow the sync of external storages – both on initial setup as well as later on in the settings. Just like you already could handle large folders to sync or not to sync.