Due to the wide variety of remote server types supported, Files.com does not check data integrity when files are transferred during sync.

We rely on the next run of the sync to again check whether the file size and file name match on the source and destination of the sync. If a file is found to be a different size at that time, Files.com will attempt to re-sync the file.

Files.com requires the remote server to accurately report file sizes. When the remote server cannot do that, syncs will not work correctly. Any remote server that doesn't accurately report file sizes should be considered incompatible for use with the remote sync feature, and you should consider an alternative, such as an Automation and Remote Mount.