More About Managing Items - Amazon KINDLE Manual

Show Amazon Items Only — shows only the content you have purchased which are
stored on Your Media Library on Amazon.com.
Show Kindle Memory Only — shows only the content you have stored on your Kindle
internal memory.
Show SD Memory Card Only — shows only the content you have stored on your SD
memory card. This menu item will be gray if no SD memory card is inserted.
Most Recent First — sorts your content by the most recently added or recently opened
items first.
Oldest First — sorts your content by the oldest added or opened items first.
Sort by Title — sorts your content alphabetically by title of the item.
Sort by Author — sorts your content alphabetically by the author's last name or
publisher's name.

More about Managing Items

Newspapers and magazines are also stored in Your Media Library but not permanently.
Most publishers allow Amazon to store seven issues of their periodical for retrieval
although this number varies by publisher.
You can download any item stored in Your Media Library to your Kindle any time you
are within Whispernet coverage. If you are not within coverage, Kindle will
automatically download the item when you re-enter Whispernet wireless service. Below
are the different graphics you will see in the left margin to indicate status of a particular
download.
Personal documents you send for conversion are not backed up on Your Media Library.
If you delete one of these items, you will need to resubmit the original document for
conversion to retrieve it.
Indicates the item is currently downloading from Amazon to your Kindle. You will see
Transferring displayed in the right margin.
Indicates the item is waiting to download from Amazon to your Kindle. If you were out
of Whispernet coverage when you made your request to download the item, it will
complete the download automatically when you re-enter coverage. You will see Cancel
displayed in the right margin. If you select Cancel, the download request will be removed.