diff --git a/integration-tests/tests/pages/submission.page.ts b/integration-tests/tests/pages/submission.page.ts
index c1b7a9d6e0..7bfdc58e93 100644
--- a/integration-tests/tests/pages/submission.page.ts
+++ b/integration-tests/tests/pages/submission.page.ts
@@ -96,7 +96,7 @@ export class SingleSequenceSubmissionPage extends SubmissionPage {
         await this.page.getByLabel('Author affiliations').fill(authorAffiliations);
     }
 
-    async fillSubmissionFormDummyOrganism({
+    async fillSubmissionFormFilesOrganism({
         submissionId,
         country,
         date,
diff --git a/integration-tests/tests/specs/features/file-sharing.spec.ts b/integration-tests/tests/specs/features/file-sharing.spec.ts
index 51364e6dea..95dfc55a3a 100644
--- a/integration-tests/tests/specs/features/file-sharing.spec.ts
+++ b/integration-tests/tests/specs/features/file-sharing.spec.ts
@@ -7,7 +7,7 @@ import { SearchPage } from '../../pages/search.page';
 import { BulkSubmissionPage, SingleSequenceSubmissionPage } from '../../pages/submission.page';
 
 const ORGANISM_NAME = 'Test organism (with files)';
-const ORGANISM_URL_NAME = 'dummy-organism-with-files';
+const ORGANISM_URL_NAME = 'test-organism-files';
 const RAW_READS = 'raw_reads';
 const METADATA_HEADERS = ['submissionId', 'country', 'date'];
 const COUNTRY_1 = 'Norway';
@@ -26,7 +26,7 @@ test('submit single seq w/ 2 files thru single seq submission form', async ({
     void groupId;
     const submissionPage = new SingleSequenceSubmissionPage(page);
     await submissionPage.navigateToSubmissionPage(ORGANISM_NAME);
-    await submissionPage.fillSubmissionFormDummyOrganism({
+    await submissionPage.fillSubmissionFormFilesOrganism({
         submissionId: ID_1,
         country: COUNTRY_1,
         date: '2023-10-15',
@@ -175,7 +175,7 @@ test('single revise seq with files via edit page', async ({ page, groupId, tmpDi
     // Step 1: Submit and release a sequence
     const submissionPage = new SingleSequenceSubmissionPage(page);
     await submissionPage.navigateToSubmissionPage(ORGANISM_NAME);
-    await submissionPage.fillSubmissionFormDummyOrganism({
+    await submissionPage.fillSubmissionFormFilesOrganism({
         submissionId: 'single-rev',
         country: COUNTRY_1,
         date: '2023-01-01',
diff --git a/kubernetes/loculus/values.yaml b/kubernetes/loculus/values.yaml
index e931f6054c..8ab4ff6f49 100644
--- a/kubernetes/loculus/values.yaml
+++ b/kubernetes/loculus/values.yaml
@@ -1645,7 +1645,7 @@ defaultOrganisms:
                 sequence: "[[URL:https://corneliusroemer.github.io/seqs/artefacts/sars-cov-2/ORF9b.fasta]]"
               - name: S
                 sequence: "[[URL:https://corneliusroemer.github.io/seqs/artefacts/sars-cov-2/S.fasta]]"
-  dummy-organism-with-files:
+  test-organism-files:
     schema:
       image: "https://cdn.who.int/media/images/default-source/mca/mca-covid-19/coronavirus-2.tmb-1920v.jpg?sfvrsn=4dba955c_19"
       organismName: "Test organism (with files)"
@@ -1657,21 +1657,41 @@ defaultOrganisms:
             - name: raw_reads
       files:
         - name: raw_reads
-      metadata: *dummyMetadata
+      metadata:
+        - name: date
+          type: date
+          initiallyVisible: true
+          header: "Collection Details"
+        - name: country
+          initiallyVisible: true
+          type: string
+          generateIndex: true
+          autocomplete: true
+          header: "Collection Details"
       website:
         tableColumns:
           - country
-          - division
           - date
         defaultOrder: descending
         defaultOrderBy: date
     preprocessing:
       - version: 1
-        image: ghcr.io/loculus-project/preprocessing-dummy
+        image: ghcr.io/loculus-project/preprocessing-nextclade
         args:
-          - "--watch"
-          - "--disableConsensusSequences"
-    referenceGenomes: []
+          - "prepro"
+        configFile:
+          log_level: DEBUG
+          batch_size: 100
+          segments:
+            - name: main
+              references:
+              - name: singleReference
+                genes: []
+    referenceGenomes:
+      - name: main
+        references:
+          - name: singleReference
+            sequence: "[[URL:https://corneliusroemer.github.io/seqs/artefacts/sars-cov-2/reference.fasta]]"
   not-aligned-organism:
     enabled: true
     schema:
diff --git a/preprocessing/nextclade/src/loculus_preprocessing/backend.py b/preprocessing/nextclade/src/loculus_preprocessing/backend.py
index cdc6fe3095..711af286a9 100644
--- a/preprocessing/nextclade/src/loculus_preprocessing/backend.py
+++ b/preprocessing/nextclade/src/loculus_preprocessing/backend.py
@@ -101,6 +101,7 @@ def parse_ndjson(ndjson_data: str) -> Sequence[UnprocessedEntry]:
             unalignedNucleotideSequences=trimmed_unaligned_nucleotide_sequences
             if unaligned_nucleotide_sequences
             else {},
+            files=json_object["data"].get("files"),
         )
         entry = UnprocessedEntry(
             accessionVersion=f"{json_object['accession']}.{json_object['version']}",
diff --git a/preprocessing/nextclade/src/loculus_preprocessing/datatypes.py b/preprocessing/nextclade/src/loculus_preprocessing/datatypes.py
index 692aac2304..1da3175a85 100644
--- a/preprocessing/nextclade/src/loculus_preprocessing/datatypes.py
+++ b/preprocessing/nextclade/src/loculus_preprocessing/datatypes.py
@@ -79,6 +79,7 @@ class UnprocessedData:
     submittedAt: str  # timestamp  # noqa: N815
     metadata: InputMetadata
     unalignedNucleotideSequences: dict[SequenceName, NucleotideSequence | None]  # noqa: N815
+    files: dict[str, list[dict[str, str]]] | None = None  # External files attached to submission
 
 
 @dataclass
diff --git a/preprocessing/nextclade/src/loculus_preprocessing/prepro.py b/preprocessing/nextclade/src/loculus_preprocessing/prepro.py
index 8ccfce847c..ef4f2eae0d 100644
--- a/preprocessing/nextclade/src/loculus_preprocessing/prepro.py
+++ b/preprocessing/nextclade/src/loculus_preprocessing/prepro.py
@@ -268,6 +268,14 @@ def processed_entry_no_alignment(  # noqa: PLR0913, PLR0917
     nucleotide_insertions: dict[SequenceName, list[NucleotideInsertion]] = {}
     amino_acid_insertions: dict[GeneName, list[AminoAcidInsertion]] = {}
 
+    # Convert files format from backend (list of dicts) to FileIdAndName objects
+    files_output = None
+    if unprocessed.files:
+        files_output = {
+            category: [FileIdAndName(fileId=f["fileId"], name=f["name"]) for f in file_list]
+            for category, file_list in unprocessed.files.items()
+        }
+
     return SubmissionData(
         processed_entry=ProcessedEntry(
             accession=accession_from_str(accession_version),
@@ -280,6 +288,7 @@ def processed_entry_no_alignment(  # noqa: PLR0913, PLR0917
                 alignedAminoAcidSequences=aligned_aminoacid_sequences,
                 aminoAcidInsertions=amino_acid_insertions,
                 sequenceNameToFastaId=sequenceNameToFastaId,
+                files=files_output,
             ),
             errors=errors,
             warnings=warnings,