will i lose my photos, voice recordings, videos and notes if i reset my samsung galaxy s1 If I reset my Samsung Galaxy S1 to factory reset mode will i lose my photos my voice recordings and my notes? 
Because i really need those, but its been so long since i've used this phone and i forgot my password to the account and the only way to delete the account is to reset the phone to factory mode i have another account but it wont let me use it. Can someone help me?
Yes. Surely you will lost your personal data, contacts and everything. To avoid this, you should Backup your files and everything to your SD Card. You can Restore it again to your mobile. 

This following site will help you how to take backup and reset your mobile and then restore it back. 

http://www.wikihow.com/Reset-a-Galaxy-S

Thats all.. :-)