diff --git a/LeStorage.xcodeproj/project.pbxproj b/LeStorage.xcodeproj/project.pbxproj
index 7580f1e..64c61aa 100644
--- a/LeStorage.xcodeproj/project.pbxproj
+++ b/LeStorage.xcodeproj/project.pbxproj
@@ -32,6 +32,7 @@
 		C4A47D9C2B7CFFE000ADC637 /* Settings.swift in Sources */ = {isa = PBXBuildFile; fileRef = C4A47D9A2B7CFFC500ADC637 /* Settings.swift */; };
 		C4A47DAF2B85FD3800ADC637 /* Errors.swift in Sources */ = {isa = PBXBuildFile; fileRef = C4A47DAE2B85FD3800ADC637 /* Errors.swift */; };
 		C4FC2E292C2B2EC30021F3BF /* StoreCenter.swift in Sources */ = {isa = PBXBuildFile; fileRef = C4FC2E282C2B2EC30021F3BF /* StoreCenter.swift */; };
+		C4FC2E312C353E7B0021F3BF /* Log.swift in Sources */ = {isa = PBXBuildFile; fileRef = C4FC2E302C353E7B0021F3BF /* Log.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -71,6 +72,7 @@
 		C4A47D9A2B7CFFC500ADC637 /* Settings.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Settings.swift; sourceTree = "<group>"; };
 		C4A47DAE2B85FD3800ADC637 /* Errors.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Errors.swift; sourceTree = "<group>"; };
 		C4FC2E282C2B2EC30021F3BF /* StoreCenter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StoreCenter.swift; sourceTree = "<group>"; };
+		C4FC2E302C353E7B0021F3BF /* Log.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Log.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -165,9 +167,10 @@
 		C4A47D9D2B7CFFF500ADC637 /* Codables */ = {
 			isa = PBXGroup;
 			children = (
-				C4A47D9A2B7CFFC500ADC637 /* Settings.swift */,
 				C4A47D992B7CFFC500ADC637 /* ApiCall.swift */,
 				C45D35902C0A1DB5000F379F /* FailedAPICall.swift */,
+				C4FC2E302C353E7B0021F3BF /* Log.swift */,
+				C4A47D9A2B7CFFC500ADC637 /* Settings.swift */,
 			);
 			path = Codables;
 			sourceTree = "<group>";
@@ -284,6 +287,7 @@
 			files = (
 				C4A47D532B6D2C5F00ADC637 /* Logger.swift in Sources */,
 				C4A47D842B7B97F000ADC637 /* KeychainStore.swift in Sources */,
+				C4FC2E312C353E7B0021F3BF /* Log.swift in Sources */,
 				C4A47D512B6D2C4E00ADC637 /* Codable+Extensions.swift in Sources */,
 				C425D4392B6D24E1002A7B48 /* LeStorage.docc in Sources */,
 				C4A47DAF2B85FD3800ADC637 /* Errors.swift in Sources */,
diff --git a/LeStorage/Codables/Log.swift b/LeStorage/Codables/Log.swift
new file mode 100644
index 0000000..943fb97
--- /dev/null
+++ b/LeStorage/Codables/Log.swift
@@ -0,0 +1,26 @@
+//
+//  Log.swift
+//  LeStorage
+//
+//  Created by Laurent Morvillier on 03/07/2024.
+//
+
+import Foundation
+
+class Log: ModelObject, Storable {
+    
+    static func resourceName() -> String { return "logs" }
+    static func tokenExemptedMethods() -> [HTTPMethod] { return [] }
+    static func filterByStoreIdentifier() -> Bool { return false }
+ 
+    var id: String = Store.randomId()
+
+    var date: Date = Date()
+    
+    var message: String
+    
+    init(message: String) {
+        self.message = message
+    }
+    
+}
diff --git a/LeStorage/Services.swift b/LeStorage/Services.swift
index 4b29dd7..8f38be3 100644
--- a/LeStorage/Services.swift
+++ b/LeStorage/Services.swift
@@ -103,12 +103,15 @@ public class Services {
             let statusCode = response.statusCode
             Logger.log("request ended with status code = \(statusCode)")
             switch statusCode {
-            case 200..<300:
-                if let apiCallId,
-                    let collectionName = (T.self as? any Storable.Type)?.resourceName() {
-                    try await StoreCenter.main.deleteApiCallById(apiCallId, collectionName: collectionName)
+            case 200..<300: // success
+                if let apiCallId {
+                    if let collectionName = (T.self as? any Storable.Type)?.resourceName() {
+                        try await StoreCenter.main.deleteApiCallById(apiCallId, collectionName: collectionName)
+                    } else {
+                        StoreCenter.main.log(message: "collectionName not found for \(type(of: T.self)), could not delete ApiCall \(apiCallId)")
+                    }
                 }
-            default:
+            default: // error
                 Logger.log("Failed Run \(request.httpMethod ?? "") \(request.url?.absoluteString ?? "")")
                 let errorString: String = String(data: task.0, encoding: .utf8) ?? ""
                 var errorMessage = ErrorMessage(error: errorString, domain: "")
@@ -126,7 +129,12 @@ public class Services {
                 
                 throw ServiceError.responseError(response: errorMessage.error)
             }
+        } else {
+            let message: String = "Unexpected and unmanaged URL Response \(task.1)"
+            StoreCenter.main.log(message: message)
+            Logger.w(message)
         }
+            
         return try jsonDecoder.decode(T.self, from: task.0)
     }
     
diff --git a/LeStorage/Store.swift b/LeStorage/Store.swift
index 33aa576..981c8aa 100644
--- a/LeStorage/Store.swift
+++ b/LeStorage/Store.swift
@@ -238,6 +238,7 @@ open class Store {
         return try await StoreCenter.main.sendDeletion(instance)
     }
     
+    /// Loads all synchronized collection with server data if they don't already have a local file
     public func loadCollectionsFromServerIfNoFile() {
         for collection in self._collections.values {
 //            Logger.log("Load \(name)")
@@ -253,6 +254,7 @@ open class Store {
         }
     }
     
+    /// Returns whether all collections have loaded locally
     public func collectionsAllLoaded() -> Bool {
         return self._collections.values.allSatisfy { $0.hasLoadedLocally }
     }
diff --git a/LeStorage/StoreCenter.swift b/LeStorage/StoreCenter.swift
index c0c188e..34ca0fd 100644
--- a/LeStorage/StoreCenter.swift
+++ b/LeStorage/StoreCenter.swift
@@ -37,6 +37,8 @@ public class StoreCenter {
     /// A collection storing FailedAPICall objects
     fileprivate var _failedAPICallsCollection: StoredCollection<FailedAPICall>? = nil
     
+    fileprivate var _logs: StoredCollection<Log>? = nil
+    
     /// A list of username that cannot synchronize with the server
     fileprivate var _blackListedUserName: [String] = []
     
@@ -382,4 +384,26 @@ public class StoreCenter {
         return try await self.apiCallCollection().sendDeletion(instance)
     }
     
+    // MARK: - Logs
+    
+    fileprivate func _logsCollection() -> StoredCollection<Log> {
+        if let logs = self._logs {
+            return logs
+        } else {
+            let logsCollection: StoredCollection<Log> = Store.main.registerCollection(synchronized: true)
+            self._logs = logsCollection
+            return logsCollection
+        }
+    }
+    
+    /// Logs a message in the logs collection
+    public func log(message: String) {
+        let log = Log(message: message)
+        do {
+            try self._logsCollection().addOrUpdate(instance: log)
+        } catch {
+            Logger.error(error)
+        }
+    }
+    
 }
diff --git a/LeStorage/Utils/Logger.swift b/LeStorage/Utils/Logger.swift
index fcc4fd7..4d79490 100644
--- a/LeStorage/Utils/Logger.swift
+++ b/LeStorage/Utils/Logger.swift
@@ -35,7 +35,7 @@ import Foundation
     
     @objc static public func w(_ message: Any, file: String = #file, function: String = #function, line: Int = #line) {
         let filestr: NSString = NSString(string: file)
-        print("Warning: \(filestr.lastPathComponent).\(line).\(function): \(message)")
+        print("!!! Warning !!! \(filestr.lastPathComponent).\(line).\(function): \(message)")
     }
         
     @objc static public func crashLogging(_ message: String, file: String = #file, function: String = #function, line: Int = #line) {