diff --git a/provider/lpffi/sdr_funcs.go b/provider/lpffi/sdr_funcs.go
index c5d8bd3f2..2ca025f47 100644
--- a/provider/lpffi/sdr_funcs.go
+++ b/provider/lpffi/sdr_funcs.go
@@ -279,18 +279,48 @@ func (sb *SealCalls) LocalStorage(ctx context.Context) ([]storiface.StoragePath,
 	return sb.sectors.localStore.Local(ctx)
 }
 
-func (sb *SealCalls) FinalizeSector(ctx context.Context, sector storiface.SectorRef) error {
-	paths, releaseSector, err := sb.sectors.AcquireSector(ctx, sector, storiface.FTCache, storiface.FTNone, storiface.PathSealing)
+func (sb *SealCalls) FinalizeSector(ctx context.Context, sector storiface.SectorRef, keepUnsealed bool) error {
+	alloc := storiface.FTNone
+	if keepUnsealed {
+		// note: In lotus-provider we don't write the unsealed file in any of the previous stages, it's only written here from tree-d
+		alloc = storiface.FTUnsealed
+	}
+
+	sectorPaths, releaseSector, err := sb.sectors.AcquireSector(ctx, sector, storiface.FTCache, alloc, storiface.PathSealing)
 	if err != nil {
 		return xerrors.Errorf("acquiring sector paths: %w", err)
 	}
 	defer releaseSector()
 
 	ssize, err := sector.ProofType.SectorSize()
+	if err != nil {
+		return xerrors.Errorf("getting sector size: %w", err)
+	}
 
-	// todo treed into unsealed
+	if keepUnsealed {
+		// tree-d contains exactly unsealed data in the prefix, so
+		// * we move it to a temp file
+		// * we truncate the temp file to the sector size
+		// * we move the temp file to the unsealed location
 
-	if err := ffi.ClearCache(uint64(ssize), paths.Cache); err != nil {
+		// move tree-d to temp file
+		tempUnsealed := filepath.Join(sectorPaths.Cache, storiface.SectorName(sector.ID))
+		if err := os.Rename(filepath.Join(sectorPaths.Cache, proofpaths.TreeDName), tempUnsealed); err != nil {
+			return xerrors.Errorf("moving tree-d to temp file: %w", err)
+		}
+
+		// truncate sealed file to sector size
+		if err := os.Truncate(tempUnsealed, int64(ssize)); err != nil {
+			return xerrors.Errorf("truncating unsealed file to sector size: %w", err)
+		}
+
+		// move temp file to unsealed location
+		if err := paths.Move(tempUnsealed, sectorPaths.Unsealed); err != nil {
+			return xerrors.Errorf("move temp unsealed sector to final location (%s -> %s): %w", tempUnsealed, sectorPaths.Unsealed, err)
+		}
+	}
+
+	if err := ffi.ClearCache(uint64(ssize), sectorPaths.Cache); err != nil {
 		return xerrors.Errorf("clearing cache: %w", err)
 	}
 
diff --git a/provider/lpmarket/deal_ingest.go b/provider/lpmarket/deal_ingest.go
index 688d1881b..bfab45e34 100644
--- a/provider/lpmarket/deal_ingest.go
+++ b/provider/lpmarket/deal_ingest.go
@@ -112,7 +112,7 @@ func (p *PieceIngester) AllocatePieceToSector(ctx context.Context, maddr address
                                         f05_deal_end_epoch) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)`,
 			mid, n, 0,
 			piece.DealProposal.PieceCID, piece.DealProposal.PieceSize,
-			source.String(), dataHdrJson, rawSize, true,
+			source.String(), dataHdrJson, rawSize, !piece.KeepUnsealed,
 			piece.PublishCid, piece.DealID, dealProposalJson, piece.DealSchedule.StartEpoch, piece.DealSchedule.EndEpoch)
 		if err != nil {
 			return false, xerrors.Errorf("inserting into sectors_sdr_initial_pieces: %w", err)
diff --git a/provider/lpseal/task_finalize.go b/provider/lpseal/task_finalize.go
index 1738eaf7b..f06b307bf 100644
--- a/provider/lpseal/task_finalize.go
+++ b/provider/lpseal/task_finalize.go
@@ -50,6 +50,12 @@ func (f *FinalizeTask) Do(taskID harmonytask.TaskID, stillOwned func() bool) (do
 	}
 	task := tasks[0]
 
+	var keepUnsealed bool
+
+	if err := f.db.QueryRow(ctx, `select bool_or(not data_delete_on_finalize) from sectors_sdr_initial_pieces where sp_id=$1 and sector_number=$2`, task.SpID, task.SectorNumber).Scan(&keepUnsealed); err != nil {
+		return false, err
+	}
+
 	sector := storiface.SectorRef{
 		ID: abi.SectorID{
 			Miner:  abi.ActorID(task.SpID),
@@ -58,7 +64,7 @@ func (f *FinalizeTask) Do(taskID harmonytask.TaskID, stillOwned func() bool) (do
 		ProofType: abi.RegisteredSealProof(task.RegSealProof),
 	}
 
-	err = f.sc.FinalizeSector(ctx, sector)
+	err = f.sc.FinalizeSector(ctx, sector, keepUnsealed)
 	if err != nil {
 		return false, xerrors.Errorf("finalizing sector: %w", err)
 	}