Sony Handycam DCR-SR20 Operating Manual page 34

 In step 2, select [
[ DELETE by date].
To delete all photos on the same day at one

time, select [
by date].
 Select
/
date of the desired movies/photos, then
select .
Press LIGHT when thumbnail is selected

to confirm the image. Select
return to the previous screen.
 Select [YES] 
US

DELETE] 
DELETE]  [
DELETE
to select the recording
to

.