lateworm

It uses the specified cloud providers to store raw (or encrypted) disk data that's been broken up into chunks. 
 
This means that the data on the CloudDrive disks are only available using our software,.  But it shows up and acts like a normal, physical disk. 
 
Additionally, it does cache the data, but retains it based on the cache settings, and disk usage (it will prune unused data, but retain frequently accessed content).   It does include a prefetching option to optimize access, and pins certain data (such as NTFS data and folder structures) to optimize access. 
 
This part is managed automatically, and not based on any user configurable values.  But you can specify the cache size (and the type of cache). 
 
 
To be honest, if you want to check it out, the software includes a 30 day, fully featured trial period, so you can test it out.