Morning all
Searched for assistance with sending books to my grand sons Sony PRS-T1.
I am getting a strange symbol where the usual epub symbol is [it looks like a V inside a box] . I am using an external hard drive rather than the computer's disk.
Found your thread,

for the help, I will now check the device to see if the books are there or not. If they are on the device, I won't worry too much

but like 'speakingtohe' I've added a lot of books and never had this problem before.
Cheers
Robyn
PS: I've got Calibre 0.9.11 running and think this program is