diff --git a/app/src/main/java/io/xpipe/app/browser/FileSystemHelper.java b/app/src/main/java/io/xpipe/app/browser/FileSystemHelper.java
index ea2bc111..b02e495a 100644
--- a/app/src/main/java/io/xpipe/app/browser/FileSystemHelper.java
+++ b/app/src/main/java/io/xpipe/app/browser/FileSystemHelper.java
@@ -60,6 +60,11 @@ public class FileSystemHelper {
                 .getShellDialect()
                 .normalizeDirectory(shell.get(), path)
                 .readOrThrow();
+
+        if (!model.getFileSystem().directoryExists(normalized)) {
+            throw new IllegalArgumentException(String.format("Directory %s does not exist", normalized));
+        }
+
         return FileNames.toDirectory(normalized);
     }
 
diff --git a/core/src/main/java/io/xpipe/core/process/CommandControl.java b/core/src/main/java/io/xpipe/core/process/CommandControl.java
index 7ee42807..de84debc 100644
--- a/core/src/main/java/io/xpipe/core/process/CommandControl.java
+++ b/core/src/main/java/io/xpipe/core/process/CommandControl.java
@@ -39,6 +39,12 @@ public interface CommandControl extends ProcessControl {
         }
     }
 
+    default boolean executeAndCheck() throws Exception {
+        try (var c = start()) {
+            return c.discardAndCheckExit();
+        }
+    }
+
     ShellControl getParent();
 
     InputStream startExternalStdout() throws Exception;
diff --git a/core/src/main/java/io/xpipe/core/process/OsType.java b/core/src/main/java/io/xpipe/core/process/OsType.java
index 45b1c934..aa7ff088 100644
--- a/core/src/main/java/io/xpipe/core/process/OsType.java
+++ b/core/src/main/java/io/xpipe/core/process/OsType.java
@@ -28,8 +28,6 @@ public interface OsType {
 
     String getTempDirectory(ShellControl pc) throws Exception;
 
-    String normalizeFileName(String file);
-
     Map<String, String> getProperties(ShellControl pc) throws Exception;
 
     String determineOperatingSystemName(ShellControl pc) throws Exception;
@@ -51,11 +49,6 @@ public interface OsType {
             return pc.executeStringSimpleCommand(pc.getShellDialect().getPrintEnvironmentVariableCommand("TEMP"));
         }
 
-        @Override
-        public String normalizeFileName(String file) {
-            return String.join("\\", file.split("[\\\\/]+"));
-        }
-
         @Override
         public Map<String, String> getProperties(ShellControl pc) throws Exception {
             try (CommandControl c = pc.command("systeminfo").start()) {
@@ -84,11 +77,6 @@ public interface OsType {
             return "/tmp/";
         }
 
-        @Override
-        public String normalizeFileName(String file) {
-            return String.join("/", file.split("[\\\\/]+"));
-        }
-
         @Override
         public String getName() {
             return "Linux";
@@ -154,11 +142,6 @@ public interface OsType {
             return found;
         }
 
-        @Override
-        public String normalizeFileName(String file) {
-            return String.join("/", file.split("[\\\\/]+"));
-        }
-
         @Override
         public String getName() {
             return "Mac";
diff --git a/core/src/main/java/io/xpipe/core/process/ShellDialect.java b/core/src/main/java/io/xpipe/core/process/ShellDialect.java
index 5bca7da1..1bab1db3 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellDialect.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellDialect.java
@@ -2,7 +2,6 @@ package io.xpipe.core.process;
 
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import io.xpipe.core.charsetter.NewLine;
-import io.xpipe.core.charsetter.StreamCharset;
 import io.xpipe.core.store.FileSystem;
 
 import java.nio.charset.Charset;
@@ -14,9 +13,7 @@ import java.util.stream.Stream;
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
 public interface ShellDialect {
 
-    default StreamCharset getTextFileCharset(ShellControl sc) {
-        return StreamCharset.get(sc.getCharset(), false);
-    }
+    CommandControl directoryExists(ShellControl shellControl,  String directory);
 
     CommandControl normalizeDirectory(ShellControl shellControl,  String directory);
 
diff --git a/core/src/main/java/io/xpipe/core/process/ShellDialects.java b/core/src/main/java/io/xpipe/core/process/ShellDialects.java
index b1208514..8adf19aa 100644
--- a/core/src/main/java/io/xpipe/core/process/ShellDialects.java
+++ b/core/src/main/java/io/xpipe/core/process/ShellDialects.java
@@ -26,10 +26,10 @@ public class ShellDialects {
 
             CMD = byName("cmd");
             POWERSHELL = byName("powershell");
-            SH = byName("sh");
             DASH = byName("dash");
             BASH = byName("bash");
             ZSH = byName("zsh");
+            SH = byName("sh");
         }
 
         @Override
diff --git a/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java b/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java
index 8207e14c..2c7be8d8 100644
--- a/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java
+++ b/core/src/main/java/io/xpipe/core/store/ConnectionFileSystem.java
@@ -31,7 +31,9 @@ public class ConnectionFileSystem implements FileSystem {
     }
 
     @Override
-    public boolean isDirectory(String file) throws Exception{return true;}
+    public boolean directoryExists(String file) throws Exception{
+        return shellControl.getShellDialect().directoryExists(shellControl, file).executeAndCheck();
+    }
 
     @Override
     public Stream<FileEntry> listFiles(String file) throws Exception {
@@ -57,21 +59,21 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public InputStream openInput(String file) throws Exception {
         return shellControl.command(proc ->
-                                        proc.getShellDialect().getFileReadCommand(proc.getOsType().normalizeFileName(file)))
+                                        proc.getShellDialect().getFileReadCommand(file))
                 .startExternalStdout();
     }
 
     @Override
     public OutputStream openOutput(String file) throws Exception {
         return shellControl.getShellDialect()
-                        .createStreamFileWriteCommand(shellControl, shellControl.getOsType().normalizeFileName(file))
+                        .createStreamFileWriteCommand(shellControl, file)
                 .startExternalStdin();
     }
 
     @Override
     public boolean exists(String file) throws Exception {
         try (var pc = shellControl.command(proc -> proc.getShellDialect()
-                        .getFileExistsCommand(proc.getOsType().normalizeFileName(file))).complex()
+                        .getFileExistsCommand(file)).complex()
                 .start()) {
             return pc.discardAndCheckExit();
         }
@@ -80,7 +82,7 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public void delete(String file) throws Exception {
         try (var pc = shellControl.command(proc -> proc.getShellDialect()
-                        .getFileDeleteCommand(proc.getOsType().normalizeFileName(file))).complex()
+                        .getFileDeleteCommand(file)).complex()
                 .start()) {
             pc.discardOrThrow();
         }
@@ -89,7 +91,7 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public void copy(String file, String newFile) throws Exception {
         try (var pc = shellControl.command(proc -> proc.getShellDialect()
-                        .getFileCopyCommand(proc.getOsType().normalizeFileName(file), proc.getOsType().normalizeFileName(newFile))).complex()
+                        .getFileCopyCommand(file, newFile)).complex()
                 .start()) {
             pc.discardOrThrow();
         }
@@ -98,7 +100,7 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public void move(String file, String newFile) throws Exception {
         try (var pc = shellControl.command(proc -> proc.getShellDialect()
-                        .getFileMoveCommand(proc.getOsType().normalizeFileName(file), proc.getOsType().normalizeFileName(newFile))).complex()
+                        .getFileMoveCommand(file, newFile)).complex()
                 .start()) {
             pc.discardOrThrow();
         }
@@ -107,7 +109,7 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public boolean mkdirs(String file) throws Exception {
         try (var pc = shellControl.command(proc -> proc.getShellDialect()
-                                         .getMkdirsCommand(proc.getOsType().normalizeFileName(file))).complex()
+                                         .getMkdirsCommand(file)).complex()
                 .start()) {
             return pc.discardAndCheckExit();
         }
@@ -116,7 +118,7 @@ public class ConnectionFileSystem implements FileSystem {
     @Override
     public void touch(String file) throws Exception {
         try (var pc = shellControl.command(proc -> proc.getShellDialect()
-                        .getFileTouchCommand(proc.getOsType().normalizeFileName(file))).complex()
+                        .getFileTouchCommand(file)).complex()
                 .start()) {
             pc.discardOrThrow();
         }
diff --git a/core/src/main/java/io/xpipe/core/store/FileSystem.java b/core/src/main/java/io/xpipe/core/store/FileSystem.java
index fb784589..b3b569a1 100644
--- a/core/src/main/java/io/xpipe/core/store/FileSystem.java
+++ b/core/src/main/java/io/xpipe/core/store/FileSystem.java
@@ -63,7 +63,7 @@ public interface FileSystem extends Closeable, AutoCloseable {
 
     void touch(String file) throws Exception;
 
-    boolean isDirectory(String file) throws Exception;
+    boolean directoryExists(String file) throws Exception;
 
     Stream<FileEntry> listFiles(String file) throws Exception;
 
diff --git a/version b/version
index a6db491d..0d240c6b 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-0.5.16
\ No newline at end of file
+0.5.17
\ No newline at end of file