If you would like to preserve the modified timestamps on your files as you migrate them into Egnyte, you have the following options:
Sync apps automatically preserve timestamps when uploading from your computer or storage device.
The latest Web UI version preserves the date in uploaded files when uploading via drag-and-drop or browsing for files on your computer.
Most FTP clients have an option to preserve timestamps of files that you upload using the client. Our help articles contains a section with setup instructions for several clients popular with our customers.