diff --git a/format.txt b/format.txt
new file mode 100644
index 0000000..59bc896
--- /dev/null
+++ b/format.txt
@@ -0,0 +1,30 @@
+string format - uint32_t len, 31 bit represents encoding where 0 is UTF-7 (ASCII), and 1 is UTF-16 (WCS-2)
+
+tag format ?
+<TAG>\0version\0
+
+/*<zar>
+	uint32_t unk1
+	uint32_t unk2
+	uint8_t unk3 ?
+	uint32_t unk4
+	0x46C - <zar> + 0x15 + (unk4 << 2) - B2 00
+	0x46D - unk5
+
+next zar = <zar> + 0x1A + unk5
+0xBC22 + (0x100<<2) = unk5 0x7659*/
+
+<saveh>
++0x0A - int16_t ?
++0x0B - 4 strings.
+	1. uknown
+	2. name
+	3. location
+	4. date
+
+<campaign_save>
+	uint32_t unk1 - used in calloc, unk1 * 0x10C
+
+<world>
+	uint32_t uncompressed_size;
+	uint32_t uncompressed_size;
\ No newline at end of file
diff --git a/src/fot/raw.rs b/src/fot/raw.rs
index 470ffdc..554ed2f 100644
--- a/src/fot/raw.rs
+++ b/src/fot/raw.rs
@@ -5,9 +5,6 @@ use std::fs::OpenOptions;
 use std::path::Path;
 use anyhow::Result;
 
-// I can use traits to dynamically implement encode/decode for every header
-// or I can just pass Vec<Block> with already encoded data to patch file
-
 pub struct Raw {
     pub offset: usize,
     pub size: usize,
diff --git a/src/fot/save.rs b/src/fot/save.rs
index 9d3d7c2..21105b1 100644
--- a/src/fot/save.rs
+++ b/src/fot/save.rs
@@ -79,42 +79,6 @@ impl Save {
     }
 
     pub fn save(&self, path: &Path) -> Result<()> {
-        let mut file = OpenOptions::new()
-            .create(true).truncate(true).write(true).open(path)?;
-
-        // write unknown block
-        /*let unk_size = match self.worlds.first() {
-            Some(w) => w.offset - 1,
-            None => return Err(anyhow!("no offsets found"))
-        };
-        file.write(&self.raw[..unk_size])?;
-
-        for world in self.worlds.iter() {
-            file.write(&self.raw[world.offset..world.offset+0x12])?;
-            file.write(&world.encode())?;
-        }*/
-
-        // determine world block size be next campaign
-        /*const START: usize = 0x99A84;
-        const END: usize = 0xD1B1E; //0xD1B1E;
-        const SIZE: usize = 0x38088;
-        //let world = self.worlds.last().unwrap();
-        let world = World::decode(&self.raw, START, END - START)?;
-        file.write(&self.raw[..START])?;
-        
-        file.write(&self.raw[world.offset..world.offset+0x13])?;
-        {
-            let enc = world.encode();
-            let real_len = SIZE;
-            println!("enc len {} real_len {}", enc.len(), real_len);
-            file.write(&enc)?;
-            if (enc.len() < real_len) {
-                file.write(&vec![0; real_len - enc.len()])?;
-            }
-        }
-
-        file.write(&self.raw[END+1..])?;*/
-
         let raw = Raw { offset: 0, size: self.raw.len(), mem: self.raw.clone() };
 
         const START: usize = 0x99A84;