diff --git a/README.md b/README.md
index 1d48d4a..c665bca 100644
--- a/README.md
+++ b/README.md
@@ -1,32 +1,14 @@
 # bit-inspector
 
 "Bit Inspector" (Bir) is a tool to manage files.
- * It is inspired by Git, but its goals are slightly different.
 
-Features
- * Tracking hash sum of files
- * Backing up directory to another location like: local, FTP(S), SFTP, HTTP(S), S3, Bir server
- * Optionally you can set a password to protect your files (if a not trusted external location like FTP or S3 is used)
- * Detecting bit rots (to keep your files forever) - found bit rots can be repaired.
- * Files are handled in a "Bir repository"
- * You can clone a remote repository
- * You can save your local repository to a remote repository.
- * Your files are versioned. You can travel in history and return to an older version of the whole repo or only a changed/deleted directory or file.
-
-What is not supported:
- * Conflict resolution is not supported. (If you wish something not yet suuported to be added, please, let's start a discussion here or at forum.nanoboot.org)
-   * "Bir" is not intended to be used by many read/write users.
-   * Several people changing one Bir repository must be avoided.
-   * "Bir" is not intended to be used by many read users and only one read/write user.  
-   * One Bir repository can be used by more users, but only one user can change it.
- * Branches are not supported
-
-## Requirements
+## Requirements to run "Bit Inspector"
 
 Requirements to run "Bit Inspector":
 * Java 19
 
 ## How to build "Bit Inspector" on your own 
+
 Requirements to build "Bit Inspector:
  * Java 19
  * Maven
@@ -43,7 +25,97 @@ Add to your .bashrc:
 
     alias bir='java -jar {path to bit-inspector jar with dependencies file}/bit-inspector-0.0.0-SNAPSHOT-jar-with-dependencies.jar'
 
-## Syntax
+## Features
+
+### Feature 1 : Bit Rot Detection (to keep your files forever)
+
+ * Hash sum of files is tracked.
+ * If last modification date of file in database and on the disk are the same, but the calculated checksum is different, then a bit rot was detected.
+ * New files are added to the database, deleted files are removed from the database.
+
+Found bit rots can be probably repaired, but only in case, you use also "Feature 2 : Backup of files"
+
+Inspired by:
+
+ * https://github.com/ambv/bitrot
+ * https://github.com/laktak/chkbit-py
+
+#### File .birignore
+
+You can create file .birignore containing the names of the files/directories you wish to ignore
+* each line should contain exactly one name
+* lines starting with # are skipped
+* you may use Unix shell-style wildcards
+
+#### File .bir.sqlite3
+
+An SQLite database
+
+#### File .bir.sqlite3.sha512
+
+Last calculated hash sum of file ".bir.sqlite3"
+
+### Feature 2 : Backup of files
+
+Inspired by Git, but goals are slightly different.
+ * https://github.com/joshnh/Git-Commands
+ * https://git-scm.com/docs
+
+#### File .birbackup
+remotes=remote1,remote2,remote3
+
+#### Features
+
+ * Backing up directory to another location like: local, FTP(S), SFTP, HTTP(S), S3, Bir server and others
+ * Optionally you can set a password to protect your files (if a not trusted external location like FTP or S3 is used)
+ 
+ * Files are handled in a "Bir repository"
+
+#### What is not supported
+
+ * Conflict resolution is not supported. (If you wish something not yet supported to be added, please, let's start a discussion here or at forum.nanoboot.org)
+   * "Bir" is not intended to be used by many read/write users.
+   * Several people changing one Bir repository must be avoided.
+   * "Bir" is not intended to be used by many read users and only one read/write user.  
+   * One Bir repository can be used by more users, but only one user can change it.
+ * Branches are not supported
+
+## Bir repository
+
+* Your files are versioned. You can travel in history and return to an older version of the whole repo or only a changed/deleted directory or file.
+
+You can:
+ * clone a remote Bir repository
+ * or use an existing local Bir repository
+ * or create a new empty Bir repository
+ * or create a new Bir repository using an existing directory
+ * or save your local repository to a remote repository.
+
+### Structure
+
+#### Directory .bir/objects
+
+.bir/objects/{??}/{?????...}
+
+#### Directory .bir/pack
+.bir/pack/pack-{sha-512}.pack
+
+#### File .bir/birindex.{number}
+
+#### File .bir/birlog
+
+Contains index number of last bir index.
+
+#### file .bir/description
+
+#### File .bir/config
+
+```
+pack-file.files-until-size.mb=100
+pack-file.max-size.mb=1000
+```
+
+## Commands
 
 bir {command} [{arg1} {arg2} {argn}]
 
@@ -51,28 +123,26 @@ Example:
 ```
 bir clone path=/home/johndoe/mydir url={local path or s3 bucket or FTP server or website url}
 ```
-
-### Arguments
+Arguments
 
 path={path to directory}
  * default:. (current working directory)
 
-## Bir repository
 
-To use Bir, a Bir repository is needed.
+### bitrot
 
-You can:
- * clone a remote Bir repository
- * or use an existing local Bir repository
- * or create a new empty Bir repository
- * or create a new Bir repository using an existing directory
+Checks for bitrots in current directory
 
-### Command : clone : Cloning a remote repo
+### clone : Cloning a remote repo
+
+```
+bir clone {url} [[--bare
+```
 
 #### Local
 
 ```
-bir clone {path to local directory = Bir repository}
+bir clone {path to another local Bir repository - path to directory}
 ```
 
 #### S3
@@ -99,31 +169,15 @@ bir clone http[s]://[{user}:{password}]@{host url}:{port}/{directory}
 bir clone bir:://[{user}:{password}]@{host url}:{port}/[path to repository/]{repository name}
 ```
 
-### Using an existing Bir repository
-
-### Creating a new empty Bir repository
-
-Go to wanted directory or use argument dir={path to wanted directory} and run:
+### init
 
+Init commands creates new directory .bir with its structure
 ```
-bir init [dir to wanted directory]
+bir init
 ```
 
-### Creating a Bir repository using an existing directory
-
-
-Go to wanted directory or use argument dir={path to wanted directory} and run:
-
-```
-bir init [dir to wanted directory]
-```
-
-
-### Commands
-
-Inspired by: 
- * https://github.com/joshnh/Git-Commands
- * https://git-scm.com/docs
+ * Creating a new empty Bir repository
+ * Creating a Bir repository using an existing directory
 
 ### help
 
@@ -135,8 +189,6 @@ Inspired by:
 
 ### reset
 
-### mv
-
 ### tag
 
 ### revert
@@ -147,25 +199,12 @@ Inspired by:
 
 ### gc
 
-### clone
-
 ### fsck
 
 ### check
 
 ### bundle
 
-```
-bir clone {url} [[--bare
-```
-
-### init
-
-Init commands creates new directory .bir with its structure
-```
-bir init [dir={path to directory}]
-```
-
 ### remote add {remote name}
 
 ```
@@ -184,63 +223,14 @@ bir commit [-m "{message}"]
 
 ### bir pull
 
-### bir status
-
-### bir add
-
-### bir rm
-
-### bir stash
-
 ### bir log
 
 ### bir diff
 
+### bir prune
 
-
-Table FILE – add new columns – linux_rights, owner, group
-
-
-###
-
-## Structure of .bir directory
-
-.bir
-.bir/objects
-.bir/remotes/{remote name}
-.bir/bir.sqlite3 ... an SQLite database
-.bir/bir.sqlite3.sha512 ...last calculated hash sum of file ".bir.sqlite3".
-.bir/config
-.bir/description
-
-
-## File .birignore
-
-You can create file .birignore containing the names of the files/directories you wish to ignore
-* each line should contain exactly one name
-* lines starting with # are skipped
-* you may use Unix shell-style wildcards
-
-## Detection of bit rots
-
-If the file last modification date in database and on the disk are the same, but the calculated checksum is different, then a bit rot was is probably detected.
-
-
-New files are added to the database, deleted files are removed from the database.
- 
-
-This program cannot restore files with bitrot.
- * You have to backup up your files (do snapshots).
-
-
-It is inspired by:
-
- * https://github.com/ambv/bitrot
- * https://github.com/laktak/chkbit-py
+bir prune origin --since 2021-10-04
 
 ## Todo
 
-New tables: FILE_HISTORY
-
-
-
+Table FILE – add new columns – linux_rights, owner, group
diff --git a/src/main/java/org/nanoboot/bitinspector/commands/CheckCommand.java b/src/main/java/org/nanoboot/bitinspector/commands/CheckCommand.java
index ca78700..58cb931 100644
--- a/src/main/java/org/nanoboot/bitinspector/commands/CheckCommand.java
+++ b/src/main/java/org/nanoboot/bitinspector/commands/CheckCommand.java
@@ -361,7 +361,7 @@ public class CheckCommand implements Command {
             if (processedCount % 100 == 0) {
                 double progress = ((double) processedCount) / countOfFilesToCalculateHashSum * 100;
                 LOG.info("Update - Progress: " + processedCount + "/" + countOfFilesToCalculateHashSum + " " + String.format("%,.2f", progress) + "%");
-                LOG.info("Remains: " + Duration.of(rtc.remainingSecondsUntilEnd(), TimeUnit.SECOND).toHumanString());
+                LOG.info("Remains: " + Duration.of(rtc.getRemainingSecondsUntilEnd(), TimeUnit.SECOND).toHumanString());
             }
             File file = new File("./" + absolutePathOfFileInDb);