Be careful - they own your data and have just recently added external cloud support for external services but have yet to adopt AWS S3 (which they use themselves as internal storage if you don't bring your own).
The system is designed to get you in and TRAP YOU - We had 1TB of shared data in the system plus 500 GB in personal data for all users combined, and to cut over to another system meant we needed to FREEZE the storage for up to 2-4 weeks (with large fees) while they backed up and shipped our data to us on a hard drive (likely AWS snowball to them, they copy to a HD then to us)(mind you production data) - this was not possible so it took a painful 3+ months to get our data out and on to another system.
Users with large amounts of data were impossible to delete and required a support call just to admin the system so they could delete the account.
We moved from a common mapped network drive G:\ with NTFS permissions. The folder structure was complex and the NTFS security was as well utilizing AD security groups. Sharefile allowed for something similar however users being users wold some how share personal folder data to other employees and the result was their entire personal folder was published to the root of the public share for all to see. We had an accounting nightmare when sales commissions were displayed to those who should not have seen it. They never could figure this out or how to fix it. And was the main reason for leaving.
The Sync agent is horrible, lots of corruption and extremely slow for our German office
Ultimately we used the drive mapper towards the end as this worked best (NOT AVAILABLE ON MAC - which we have 10 users that were forced to use the web). They push the Sync Agent as the main windows client
all in all poor support - I almost always had to resolve my own issues 90% of the time. Poor desktop sync clients, no mapper MAC support, lots of security issues, performance issues, and difficult to perform simple admin functions like deleting users.
They were not ready for us. We have true enterprise and international needs at data volume scale and were looking to replace our mapped network drive with ShareFile - it failed miserably.
Alternatively we evaluated Storage Made Easy (SME) and CentreStack - I chose CentreStack as I have more control and super reasonable pricing (40% less that ShareFile). SME is the middle ground and less control but way more stable (25% less than ShareFile)