Update README.md

README.md

@@ -1,9 +1,13 @@
+<img src="https://cdn.onlinewebfonts.com/svg/img_535582.png" width="128" height="128">
+
 # s3perka - copy S3 objects between different AWS partitions (China, GovCloud)
 
 Use this tool if you need to copy S3 objects to/from AWS China or GovCloud, which 
 are **different AWS partitions** and hence you **cannot** use `aws s3 sync`
 
-It supports massive parallelism (dozens or 100+ simultaneus copies) as this has proven speeding up copying especially to AWS China.
+* supports massive parallelism (dozens or 100+ simultaneus copies) as this has proven speeding up copying especially to AWS China
+* only copies files from source, that do not exist or whose size on destination differs
+* does not delete files on destination bucket
 
 # Installation
 
@@ -13,7 +17,7 @@ cd ~/git
 git clone https://github.com/zytek/s3perka
 cd s3perka
 ```
-2. Using go 1.13+ run
+2.  Build, using go 1.13+ for module support
 
 ```go build```
 
@@ -39,6 +43,6 @@ parallel=50
 
 # Caveats
 
-* `s3perka` downloads files on disk and then uploads them. Currently there is no "on-the-fly" copy mode
+* `s3perka` downloads files on disk and then uploads them. Currently there is no "on-the-fly" (in-memory) copy mode
   * make sure you have enough disk space for largest file to fit
   * make sure youd HDD can handle such parallelism level