diff --git a/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/files/Files.scala b/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/files/Files.scala
index c2128cd617..8d5335eddd 100644
--- a/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/files/Files.scala
+++ b/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/files/Files.scala
@@ -232,7 +232,7 @@ final class Files(
       s3Metadata            <- fileOperations.register(storage, path)
       filename              <- IO.fromOption(path.lastSegment)(InvalidFilePath)
       attr                   = FileAttributes.from(
-                                 FileDescription(filename, Some(mediaType.getOrElse(s3Metadata.contentType)), metadata),
+                                 FileDescription(filename, mediaType.orElse(s3Metadata.contentType), metadata),
                                  s3Metadata.metadata
                                )
       res                   <- eval(
diff --git a/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/storages/operations/s3/S3FileOperations.scala b/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/storages/operations/s3/S3FileOperations.scala
index 6b9dba50d4..a088cff6e6 100644
--- a/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/storages/operations/s3/S3FileOperations.scala
+++ b/delta/plugins/storage/src/main/scala/ch/epfl/bluebrain/nexus/delta/plugins/storage/storages/operations/s3/S3FileOperations.scala
@@ -5,7 +5,6 @@ import akka.http.scaladsl.model.{BodyPartEntity, ContentType, Uri}
 import akka.stream.scaladsl.Source
 import akka.util.ByteString
 import cats.effect.IO
-import cats.syntax.all._
 import ch.epfl.bluebrain.nexus.delta.kernel.Logger
 import ch.epfl.bluebrain.nexus.delta.kernel.utils.UUIDF
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.files.model.FileAttributes.FileAttributesOrigin
@@ -14,7 +13,7 @@ import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.model.DigestAlgori
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.model.Storage.S3Storage
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.model.StorageRejection.StorageNotAccessible
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.operations.StorageFileRejection.FetchFileRejection.UnexpectedFetchError
-import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.operations.StorageFileRejection.RegisterFileRejection.{InvalidContentType, MissingContentType}
+import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.operations.StorageFileRejection.RegisterFileRejection.InvalidContentType
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.operations.s3.S3FileOperations.S3FileMetadata
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.operations.s3.client.S3StorageClient
 import ch.epfl.bluebrain.nexus.delta.plugins.storage.storages.operations.s3.client.S3StorageClient.HeadObject
@@ -43,7 +42,7 @@ trait S3FileOperations {
 }
 
 object S3FileOperations {
-  final case class S3FileMetadata(contentType: ContentType, metadata: FileStorageMetadata)
+  final case class S3FileMetadata(contentType: Option[ContentType], metadata: FileStorageMetadata)
 
   def mk(client: S3StorageClient)(implicit as: ActorSystem, uuidf: UUIDF): S3FileOperations = new S3FileOperations {
 
@@ -86,9 +85,15 @@ object S3FileOperations {
         log.error(e)(s"Failed fetching required attributes for S3 file registration. Bucket $bucket and path $path")
       }
 
-    private def parseContentType(raw: Option[String]): IO[ContentType] = {
-      IO.fromOption(raw)(MissingContentType)
-        .flatMap(raw => ContentType.parse(raw).map(_.pure[IO]).getOrElse(IO.raiseError(InvalidContentType(raw))))
+    private def parseContentType(raw: Option[String]): IO[Option[ContentType]] = {
+      raw match {
+        case Some(value) =>
+          ContentType.parse(value) match {
+            case Left(_)      => IO.raiseError(InvalidContentType(value))
+            case Right(value) => IO.pure(Some(value))
+          }
+        case None        => IO.none
+      }
     }
 
     private def mkS3Metadata(bucket: String, path: Uri.Path, resp: HeadObject) = {