Dataman Vali-Flash 4.1 - Manual (Page 19)

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Q: Does viewing properties of files on a PC change the Vali-Flash signature?
A: If viewing a file caused the OS to update the access timestamp then yes. Otherwise no. File systems that are
supported by Windows® can be updated. This is outside of our control.
Customers who do not use Microsoft® Windows® supported file systems do not have this problem.
Customers who use a file system supported by Microsoft® Windows® would be advised to request a read-only reader.
The actual reader will prevent the OS from writing to the card. This can be bundled with Vali-Flash as a special order
but due to supplier requirements it cannot be resold as is. It must be bundled with Vali-Flash. Contact us for more
details.
Q: Does copying files on a PC change the Vali-Flash signature?
A: Copying a file would update the access timestamp and thus changes the raw data, so yes. Unless some software
layer blocked the write or timestamp was not used or the media is read-only. By default they will change.
Q: Does opening files on a PC change the Vali-Flash signature?
A: Yes, this would change the access timestamp of that file by default.