ASA flash: files..................what to delete???

Hi, ive been kind of a spectator here and this is my first post. Im gonna try to participate from now on.

Sorry to start here with a question

So I recently bought an ASA 5505 really cheap.....

Wanted to wipe out everything from the flash and leave only the essential files.
I know I need the IOS and maybe the asdm but not sure about the rest........

Googled the question and found nothing about it....plus, Im pretty new in the cisco world.
Work for an ISP doing cabling for the most part but want to get a CCNA R&S and Security and then who knows

Anyway....

Here is whats on flash:, maybe someone here cant point in the right direction

obs!!! english 2nd language

---

ciscoasa# show flash:
-#- --length--

---

date/time

---

path
6 8515584 Aug 04 2008 08:38:20 asa724-k8.bin
7 4181246 Aug 04 2008 08:39:24 securedesktop-asa-3.2.1.103-k9.pkg
8 398305 Aug 04 2008 08:39:42 sslclient-win-1.1.0.154.pkg
9 6514852 Aug 04 2008 08:41:26 asdm-524.bin
12 0 Aug 04 2008 08:45:30 crypto_archive
13 14524416 Mar 31 2009 15:30:46 asa802.bin
14 0 Mar 31 2009 15:34:34 log
24 5 Mar 31 2009 15:35:00 csco_config/locale/clean.8.0.done
27 3224 Mar 31 2009 15:35:00 csco_config/locale/ja/LC_MESSAGES/customization.po
28 4481 Mar 31 2009 15:35:00 csco_config/locale/ja/LC_MESSAGES/PortForwarder.po
29 31925 Mar 31 2009 15:35:00 csco_config/locale/ja/LC_MESSAGES/webvpn.po
32 2430 Mar 31 2009 15:35:00 csco_config/locale/fr/LC_MESSAGES/customization.po
33 4149 Mar 31 2009 15:35:00 csco_config/locale/fr/LC_MESSAGES/PortForwarder.po
34 29961 Mar 31 2009 15:35:00 csco_config/locale/fr/LC_MESSAGES/webvpn.po
36 2864 Jun 12 2009 18:57:32 csco_config/locale/LC_MESSAGES/PortForwarder.po
37 18061 Jun 12 2009 18:57:32 csco_config/locale/LC_MESSAGES/webvpn.po
38 896 Jun 12 2009 18:57:32 csco_config/locale/LC_MESSAGES/banners.po
39 6889764 Mar 31 2009 16:16:30 asdm602.bin


85819392 bytes available (41291776 bytes used)

---

Thanks in advance!!!