Forum Discussion
From "Available on this device" to "Always available on this device"
"Always available on this device" means that you explicitly requested to sync permanently the item. Hence the system will never automatically delete the local copy.
"Available on this device" means that the item has been used locally and hence temporarily synced to the device. Hence the system will automatically delete the local copy when needed.
Makes sense?
There's always an instance of the files on the Cloud. The status only determines what happens on your device.
Windows 10 has a feature called Storage Sense. So you can set the limit of a disk to say 90% before it begins to trim old unused files. This is incredibly useful for small SSD drives.
What does this mean for One Drive?
When Storage Sense goes out to trim from temp folders and such, it also looks at One Drive and will re-cloud the oldest files you opened and are resident on the machine so they are set back to the cloud. If you on occasion open files that are very important to you, you can set them to always on this machine and they will not be subject to this cleanup routine.