diff --git a/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/GeoTiffProductReaderPlugIn.java b/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/GeoTiffProductReaderPlugIn.java
index 149dd0cc037..d114b2eb2a3 100644
--- a/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/GeoTiffProductReaderPlugIn.java
+++ b/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/GeoTiffProductReaderPlugIn.java
@@ -36,6 +36,7 @@
 import java.nio.file.FileSystem;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.Locale;
@@ -76,8 +77,10 @@ public DecodeQualification getDecodeQualification(Object productInputFile) {
                 if (fileExtension != null) {
                     boolean extensionMatches = Arrays.stream(TIFF_FILE_EXTENSION).anyMatch(fileExtension::equalsIgnoreCase);
                     if (extensionMatches) {
-                        try (ImageInputStream imageInputStream = ImageIO.createImageInputStream(productInputFile)) {
-                            return getDecodeQualificationImpl(imageInputStream);
+                        try (InputStream fileInputStream = productPath.getFileSystem().provider().newInputStream(productPath, StandardOpenOption.READ)) {
+                            try (ImageInputStream imageInputStream = ImageIO.createImageInputStream(fileInputStream)) {
+                                return getDecodeQualificationImpl(imageInputStream);
+                            }
                         }
                     } else if (fileExtension.equalsIgnoreCase(ZIP_FILE_EXTENSION)) {
                         return checkZipArchive(productPath);
diff --git a/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/Utils.java b/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/Utils.java
index 71362cf02ee..33bbee5ddc5 100644
--- a/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/Utils.java
+++ b/snap-geotiff/src/main/java/org/esa/snap/dataio/geotiff/Utils.java
@@ -39,9 +39,11 @@
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.StringReader;
 import java.nio.ByteOrder;
 import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
@@ -57,22 +59,24 @@ public class Utils {
      * @param filePath The file path
      */
     public static boolean isCOGGeoTIFF(Path filePath) throws Exception {
-        try (ImageInputStream imageInputStream = ImageIO.createImageInputStream(filePath.toFile())) {
-            final Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
-            TIFFImageReader tiffReader = null;
-            while (imageReaders.hasNext()) {
-                final ImageReader reader = imageReaders.next();
-                if (reader instanceof TIFFImageReader) {
-                    tiffReader = (TIFFImageReader) reader;
-                    tiffReader.setInput(imageInputStream);
-                    break;
+        try (InputStream fileInputStream = filePath.getFileSystem().provider().newInputStream(filePath, StandardOpenOption.READ)) {
+            try (ImageInputStream imageInputStream = ImageIO.createImageInputStream(fileInputStream)) {
+                final Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
+                TIFFImageReader tiffReader = null;
+                while (imageReaders.hasNext()) {
+                    final ImageReader reader = imageReaders.next();
+                    if (reader instanceof TIFFImageReader) {
+                        tiffReader = (TIFFImageReader) reader;
+                        tiffReader.setInput(imageInputStream);
+                        break;
+                    }
+                }
+                if (tiffReader == null) {
+                    throw new Exception("No tiff reader found!");
                 }
-            }
-            if (tiffReader == null) {
-                throw new Exception("No tiff reader found!");
-            }
 
-            return isCOGGeoTIFF(tiffReader);
+                return isCOGGeoTIFF(tiffReader);
+            }
         }
     }
 
diff --git a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/AbstractRemoteWalker.java b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/AbstractRemoteWalker.java
index e1514e9bae6..5e83ffa6f23 100644
--- a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/AbstractRemoteWalker.java
+++ b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/AbstractRemoteWalker.java
@@ -29,9 +29,8 @@ protected AbstractRemoteWalker(IRemoteConnectionBuilder remoteConnectionBuilder)
     public BasicFileAttributes readBasicFileAttributes(VFSPath path) throws IOException {
         // check if the address represents a directory
         String address = path.buildURL().toString();
-        String fileSystemSeparator = path.getFileSystem().getSeparator();
         String fileSystemRoot = path.getFileSystem().getRoot().getPath();
-        URL directoryURL = new URL(address + (address.endsWith(fileSystemSeparator) ? "" : fileSystemSeparator));
+        URL directoryURL = getDirectoryURL(path);
         HttpURLConnection connection = this.remoteConnectionBuilder.buildConnection(fileSystemRoot, directoryURL, "GET", null);
         try {
             int responseCode = connection.getResponseCode();
@@ -46,6 +45,12 @@ public BasicFileAttributes readBasicFileAttributes(VFSPath path) throws IOExcept
         return readFileAttributes(address, path.toString(), fileSystemRoot);
     }
 
+    protected URL getDirectoryURL(VFSPath path) throws IOException{
+        final String address = path.buildURL().toString();
+        final String fileSystemSeparator = path.getFileSystem().getSeparator();
+        return new URL(address + (address.endsWith(fileSystemSeparator) ? "" : fileSystemSeparator));
+    }
+
     private BasicFileAttributes readFileAttributes(String urlAddress, String filePath, String fileSystemRoot) throws IOException {
         RegularFileMetadata regularFileMetadata = HttpUtils.readRegularFileMetadata(urlAddress, this.remoteConnectionBuilder, fileSystemRoot);
         return VFSFileAttributes.newFile(filePath, regularFileMetadata);
diff --git a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/VFSByteChannel.java b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/VFSByteChannel.java
index 16ac2a57b94..cbaf023f214 100644
--- a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/VFSByteChannel.java
+++ b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/VFSByteChannel.java
@@ -138,7 +138,7 @@ public int read(ByteBuffer destinationBuffer) throws IOException {
         int bytesToRead = destinationBuffer.remaining();
         if (destinationBuffer.hasArray()) {
             bytes = destinationBuffer.array();
-            offset = destinationBuffer.arrayOffset();
+            offset = destinationBuffer.position();
         } else {
             bytes = new byte[bytesToRead];
             offset = 0;
diff --git a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3ResponseHandler.java b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3ResponseHandler.java
index 2e42ba78828..5cc0e6eae63 100644
--- a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3ResponseHandler.java
+++ b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3ResponseHandler.java
@@ -44,6 +44,11 @@ public class S3ResponseHandler extends DefaultHandler {
      */
     private static final String NEXT_CONTINUATION_TOKEN_ELEMENT = "NextContinuationToken";
 
+    /**
+     * The name of XML element for NextContinuationToken, used on parsing VFS service response XML.
+     */
+    private static final String NEXT_MARKER_ELEMENT = "NextMarker";
+
     /**
      * The name of XML element for IsTruncated, used on parsing VFS service response XML.
      */
@@ -195,6 +200,7 @@ public void characters(char[] ch, int start, int length) throws SAXException {
                     this.isTruncated = getBooleanValue(ch, start, length);
                     break;
                 case NEXT_CONTINUATION_TOKEN_ELEMENT:
+                case NEXT_MARKER_ELEMENT:
                     this.nextContinuationToken = getTextValue(ch, start, length);
                     break;
                 case PREFIX_ELEMENT:
diff --git a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3Walker.java b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3Walker.java
index a51ce260f4a..238aab87543 100644
--- a/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3Walker.java
+++ b/snap-virtual-file-system/src/main/java/org/esa/snap/vfs/remote/s3/S3Walker.java
@@ -130,6 +130,12 @@ public synchronized List<BasicFileAttributes> walk(VFSPath dir) throws IOExcepti
         return items;
     }
 
+    protected URL getDirectoryURL(VFSPath dir) throws IOException {
+        String dirPath = dir.toString();
+        String s3Prefix = buildPrefix(dirPath + (dirPath.endsWith("/") ? "" : "/"));
+        return new URL(buildS3URL(s3Prefix, ""));
+    }
+
     private String buildPrefix(String prefix) {
         prefix = prefix.replace(this.root, "");
         prefix = prefix.replaceAll("^/", "");
@@ -143,7 +149,7 @@ private String buildS3URL(String prefix, String nextContinuationToken) throws IO
         addParam(paramBase, "prefix", prefix);
         addParam(paramBase, "delimiter", this.delimiter);
         StringBuilder params = new StringBuilder(paramBase);
-        addParam(params, "continuation-token", nextContinuationToken);
+        addParam(params, "marker", nextContinuationToken);
         String s3URL = this.address + (this.address.endsWith(this.delimiter) ? "" : this.delimiter) + currentBucket;
         if (params.length() > 0) {
             s3URL += "?" + params;