diff --git a/services/folderProcessor.js b/services/folderProcessor.js
index b0c73a9..3927d5d 100644
--- a/services/folderProcessor.js
+++ b/services/folderProcessor.js
@@ -3,7 +3,44 @@ const path = require('path');
 const { getDestinationDecision, getCadInfo } = require('./router');
 const { buildDestinationIndex } = require('./destinationIndex');
 const { buildExistingCadKeyIndex, toCadKey } = require('./duplicateIndex');
-const { getUnroutedTarget, getDuplicateTarget } = require('./unrouted');
+const { prepareUnroutedTarget, prepareDuplicateTarget } = require('./unrouted');
+
+function parseNumericVersion(version) {
+  const rawVersion = String(version || '').trim();
+  if (!rawVersion || !/^\d+$/.test(rawVersion)) {
+    return null;
+  }
+
+  try {
+    return BigInt(rawVersion);
+  } catch {
+    return null;
+  }
+}
+
+function buildHighestNumericVersionByCadKey(files) {
+  const index = new Map();
+
+  for (const row of files) {
+    const cadInfo = getCadInfo(row.fileName);
+    if (!cadInfo) {
+      continue;
+    }
+
+    const version = parseNumericVersion(cadInfo.version);
+    if (version === null) {
+      continue;
+    }
+
+    const key = toCadKey(cadInfo);
+    const current = index.get(key);
+    if (current === undefined || version > current) {
+      index.set(key, version);
+    }
+  }
+
+  return index;
+}
 
 async function collectFilesRecursively(rootDir) {
   const files = [];
@@ -33,6 +70,7 @@ async function processFolder(folder, config) {
   const files = await collectFilesRecursively(folder);
   const destinationIndex = await buildDestinationIndex(config?.destination);
   const existingCadKeys = await buildExistingCadKeyIndex(config?.destination);
+  const sourceMaxVersions = buildHighestNumericVersionByCadKey(files);
   const result = {
     scanned: 0,
     copied: 0,
@@ -53,7 +91,26 @@ async function processFolder(folder, config) {
     }
 
     if (existingCadKeys.has(toCadKey(cadInfo))) {
-      const duplicateTarget = await getDuplicateTarget(file);
+      const incomingVersion = parseNumericVersion(cadInfo.version);
+      const highestInSource = sourceMaxVersions.get(toCadKey(cadInfo));
+      if (incomingVersion !== null && highestInSource !== undefined && incomingVersion < highestInSource) {
+        result.details.push({
+          file,
+          reason: 'Versione piu alta presente nei file da smistare',
+        });
+        continue;
+      }
+
+      const duplicateTarget = await prepareDuplicateTarget(file);
+      if (!duplicateTarget.shouldCopy) {
+        result.details.push({
+          file,
+          destination: duplicateTarget.destinationDir,
+          reason: duplicateTarget.reason || 'Versione piu alta gia presente',
+        });
+        continue;
+      }
+
       await fs.copy(fullPath, duplicateTarget.destinationPath, { overwrite: false });
 
       result.copied += 1;
@@ -70,7 +127,16 @@ async function processFolder(folder, config) {
     const destDir = decision.destination;
 
     if (!destDir) {
-      const unroutedTarget = await getUnroutedTarget(file);
+      const unroutedTarget = await prepareUnroutedTarget(file);
+      if (!unroutedTarget.shouldCopy) {
+        result.details.push({
+          file,
+          destination: unroutedTarget.destinationDir,
+          reason: unroutedTarget.reason || 'Versione piu alta gia presente',
+        });
+        continue;
+      }
+
       await fs.copy(fullPath, unroutedTarget.destinationPath, { overwrite: false });
 
       result.copied += 1;
diff --git a/services/unrouted.js b/services/unrouted.js
index 61d05e0..303de26 100644
--- a/services/unrouted.js
+++ b/services/unrouted.js
@@ -1,6 +1,7 @@
 const fs = require('fs-extra');
 const path = require('path');
 const os = require('os');
+const { getCadInfo } = require('./router');
 
 const PRIMARY_UNROUTED_DIR = '/cadroute/__NON_SMISTATI';
 const HOME_UNROUTED_DIR = path.join(os.homedir(), '.cadroute', '__NON_SMISTATI');
@@ -83,6 +84,100 @@ async function getDuplicateTarget(fileName) {
   return getTarget('duplicates', fileName);
 }
 
+function parseNumericVersion(version) {
+  const rawVersion = String(version || '').trim();
+  if (!rawVersion || !/^\d+$/.test(rawVersion)) {
+    return null;
+  }
+
+  try {
+    return BigInt(rawVersion);
+  } catch {
+    return null;
+  }
+}
+
+function normalizeCadKey(cadInfo) {
+  return String(cadInfo?.key || '').toLowerCase();
+}
+
+async function findComparableVersionFiles(destinationDir, incomingCadInfo) {
+  const incomingKey = normalizeCadKey(incomingCadInfo);
+  const entries = await fs.readdir(destinationDir, { withFileTypes: true }).catch(() => []);
+  const comparable = [];
+
+  for (const entry of entries) {
+    if (!entry.isFile()) {
+      continue;
+    }
+
+    const cadInfo = getCadInfo(entry.name);
+    if (!cadInfo || normalizeCadKey(cadInfo) !== incomingKey) {
+      continue;
+    }
+
+    const numericVersion = parseNumericVersion(cadInfo.version);
+    if (numericVersion === null) {
+      continue;
+    }
+
+    comparable.push({
+      path: path.join(destinationDir, entry.name),
+      version: numericVersion,
+      name: entry.name,
+    });
+  }
+
+  return comparable;
+}
+
+async function prepareSpecialTarget(kind, fileName) {
+  const destinationDir = await resolveTargetDir(kind);
+  const incomingCadInfo = getCadInfo(fileName);
+  if (!incomingCadInfo) {
+    const destinationPath = await getUniquePath(destinationDir, fileName);
+    return { shouldCopy: true, destinationDir, destinationPath };
+  }
+
+  const incomingVersion = parseNumericVersion(incomingCadInfo.version);
+  if (incomingVersion === null) {
+    const destinationPath = await getUniquePath(destinationDir, fileName);
+    return { shouldCopy: true, destinationDir, destinationPath };
+  }
+
+  const comparable = await findComparableVersionFiles(destinationDir, incomingCadInfo);
+  if (!comparable.length) {
+    const destinationPath = await getUniquePath(destinationDir, fileName);
+    return { shouldCopy: true, destinationDir, destinationPath };
+  }
+
+  const highest = comparable.reduce((max, row) => (row.version > max.version ? row : max));
+  if (incomingVersion <= highest.version) {
+    return {
+      shouldCopy: false,
+      destinationDir,
+      reason: `Versione piu alta gia presente (${highest.name})`,
+    };
+  }
+
+  await Promise.all(comparable.map((row) => fs.remove(row.path)));
+  const destinationPath = await getUniquePath(destinationDir, fileName);
+  return {
+    shouldCopy: true,
+    destinationDir,
+    destinationPath,
+    cleaned: comparable.length,
+  };
+}
+
+async function prepareUnroutedTarget(fileName) {
+  return prepareSpecialTarget('unrouted', fileName);
+}
+
+async function prepareDuplicateTarget(fileName) {
+  return prepareSpecialTarget('duplicates', fileName);
+}
+
 async function listFilesRecursively(rootDir) {
   const files = [];
 
@@ -156,6 +251,8 @@ async function clearDuplicateFiles() {
 module.exports = {
   getUnroutedTarget,
   getDuplicateTarget,
+  prepareUnroutedTarget,
+  prepareDuplicateTarget,
   resolveUnroutedDir,
   resolveDuplicatesDir,
   listUnroutedFiles,
diff --git a/services/zipProcessor.js b/services/zipProcessor.js
index 09d9aa8..eb87d73 100644
--- a/services/zipProcessor.js
+++ b/services/zipProcessor.js
@@ -5,12 +5,62 @@ const { pipeline } = require('stream/promises');
 const { getDestinationDecision, getCadInfo } = require('./router');
 const { buildDestinationIndex } = require('./destinationIndex');
 const { buildExistingCadKeyIndex, toCadKey } = require('./duplicateIndex');
-const { getUnroutedTarget, getDuplicateTarget } = require('./unrouted');
+const { prepareUnroutedTarget, prepareDuplicateTarget } = require('./unrouted');
+
+function parseNumericVersion(version) {
+  const rawVersion = String(version || '').trim();
+  if (!rawVersion || !/^\d+$/.test(rawVersion)) {
+    return null;
+  }
+
+  try {
+    return BigInt(rawVersion);
+  } catch {
+    return null;
+  }
+}
+
+async function buildZipHighestNumericVersionByCadKey(zipPath) {
+  const index = new Map();
+  let directory;
+
+  try {
+    directory = await unzipper.Open.file(zipPath);
+  } catch {
+    return index;
+  }
+
+  for (const row of directory.files || []) {
+    if (row.type !== 'File') {
+      continue;
+    }
+
+    const baseName = path.basename(row.path || '');
+    const cadInfo = getCadInfo(baseName);
+    if (!cadInfo) {
+      continue;
+    }
+
+    const version = parseNumericVersion(cadInfo.version);
+    if (version === null) {
+      continue;
+    }
+
+    const key = toCadKey(cadInfo);
+    const current = index.get(key);
+    if (current === undefined || version > current) {
+      index.set(key, version);
+    }
+  }
+
+  return index;
+}
 
 async function processZip(zipPath, config) {
   const stream = fs.createReadStream(zipPath).pipe(unzipper.Parse({ forceStream: true }));
   const destinationIndex = await buildDestinationIndex(config?.destination);
   const existingCadKeys = await buildExistingCadKeyIndex(config?.destination);
+  const sourceMaxVersions = await buildZipHighestNumericVersionByCadKey(zipPath);
   const result = {
     scanned: 0,
     copied: 0,
@@ -38,7 +88,28 @@ async function processZip(zipPath, config) {
     }
 
     if (existingCadKeys.has(toCadKey(cadInfo))) {
-      const duplicateTarget = await getDuplicateTarget(baseName);
+      const incomingVersion = parseNumericVersion(cadInfo.version);
+      const highestInSource = sourceMaxVersions.get(toCadKey(cadInfo));
+      if (incomingVersion !== null && highestInSource !== undefined && incomingVersion < highestInSource) {
+        result.details.push({
+          file: baseName,
+          reason: 'Versione piu alta presente nei file da smistare',
+        });
+        entry.autodrain();
+        continue;
+      }
+
+      const duplicateTarget = await prepareDuplicateTarget(baseName);
+      if (!duplicateTarget.shouldCopy) {
+        result.details.push({
+          file: baseName,
+          destination: duplicateTarget.destinationDir,
+          reason: duplicateTarget.reason || 'Versione piu alta gia presente',
+        });
+        entry.autodrain();
+        continue;
+      }
+
       await pipeline(entry, fs.createWriteStream(duplicateTarget.destinationPath));
 
       result.copied += 1;
@@ -55,7 +126,17 @@ async function processZip(zipPath, config) {
     const destDir = decision.destination;
 
     if (!destDir) {
-      const unroutedTarget = await getUnroutedTarget(baseName);
+      const unroutedTarget = await prepareUnroutedTarget(baseName);
+      if (!unroutedTarget.shouldCopy) {
+        result.details.push({
+          file: baseName,
+          destination: unroutedTarget.destinationDir,
+          reason: unroutedTarget.reason || 'Versione piu alta gia presente',
+        });
+        entry.autodrain();
+        continue;
+      }
+
       await pipeline(entry, fs.createWriteStream(unroutedTarget.destinationPath));
 
       result.copied += 1;