Update readme.md

Add other needed instuctions

.github/readme.md

@@ -24,13 +24,42 @@ If you want to contribute as a developer, please contact us in the [Discord](htt
 1. Install dependencies for Debian-like distributions
    
    `sudo apt install build-essential cmake libunwind-dev libglfw3-dev libvulkan-dev vulkan-validationlayers-dev spirv-tools glslang-tools libspirv-cross-c-shared-dev libxbyak-dev`
-2. Building
+   
+3. Building
    
    `mkdir -p build && cd build && cmake .. && cmake --build .`
 
-4. Run
+4. How to create to create virtual hdd
+
+   Setup size of virtual hdd
+ 
+   `truncate -s 512M ps4-hdd.exfat`
+
+   `mkfs.exfat -n PS4-HDD ./ps4-hdd.exfat`
+
+    `mkdir ps4-fs`
+
+    `sudo mount -t exfat -o uid=`id -u`,gid=`id -g` ./ps4-hdd.exfat ./ps4-fs`
+
+5. Run
    
-   See usage message of `rpcsx-os` (`-h` argument), or join the [Discord](https://discord.gg/t6dzA4wUdG) for help.
+     See usage message of `rpcsx-os` (`-h` argument), or join the [Discord](https://discord.gg/t6dzA4wUdG) for help.
+
+     you can run emulator with Samples using this command:
+   
+     `rm -f /dev/shm/rpcsx-* && ./rpcsx-os --mount  "<path to fw>/system" "/system" --mount "<path to 'game' root>" /app0 /app0/some-test-sample.elf [<args for test elf>...]`
+
+ 6. Creating a log
+
+    use flag
+    
+    `--trace` if you got sigfault
+    
+    you can redirect all log messages to the file by appending following to command:
+
+     `&>log.txt`
+      
+
 
 ## License