Thread: Touch about micro sd cards
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Old 10-25-2012, 07:11 PM   #8
davidfor
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Quote:
Originally Posted by _pietro View Post
to prevent deleting book from the database and reinserting them when you use two sd cards, the GUID indentify a sd card... if i undenstand well as it works the process of reading a card
OK, you want to store information so that when a card is inserted, the device can tell if it has seen the card before and also keeps a set of database records for each card it has seen. That could work, but there is a problem if you use a card once. There could be a large number of database records for a card that someone lent you to read one book. This will have an impact on performance.

The other impact is that the device doesn't care which card a book is on. If I used a 1GB card and filled it, then bought a 4GB card and copied the books from the 1GB card to this, the device doesn't care. So long as the books have the same name and path, they are the same books. You won't lose your reading status when you start using the 4GB card.
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