Sony DPT-S1 User Manual page 18

 Do not format the device or your microSD card via
your computer. If you have formatted the device or
microSD card on your computer, the device may not
be able to display transferred content. In this case,
use the device's [Format Memory] function to
reformat the device and your microSD card
(page 54).
 Sony recommends that you create a backup of the
contents of the device in case of operation error or
data corruption.
 Sony does not provide any guarantee in the event
of the following.
Download/transfer failure
Document/annotations, etc., corruption or
deletion
Tip
 When you transfer data to the microSD card, insert
the microSD card in the device, and drag-and-drop
to the microSD (removable disk) drive.
 For details on supported file formats, see page 66.
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