Currently we're working with DropBox in it's free version but having hard times managing permissions and controlling the environment (who's inviting who, who's deleting what etc...)
We're looking for alternatives, it can be either another ed. of DropBox (their support is not responsive, 2 mails was sent already), or a different product which allow the following characterization:
01. Permissions management
02. Saves local copy to each user's computer
03. Logs, logs, logs !
04. Ability to retrieve deleted files and folders and version control of doc's (optional)
05. Small-Medium quota - at least 20GB
Thanks in advance