diff --git a/s3/s3.go b/s3/s3.go
index 2c5eab9fb3d1589be018717d8d695cc4c81c6e36..11c9c7a0da980a223a99e29423b37c17d27fe6db 100644
--- a/s3/s3.go
+++ b/s3/s3.go
@@ -30,7 +30,7 @@ type S3UploadResponse struct {
 type S3UploadSettings struct {
 	MimeType              MIMEType
 	RetrieveSignedUrl     bool
-	ExpiryDuration        *time.Duration
+	ExpiryDuration        *time.Duration // Used to set expiry datetime of download links. NB: does not affect deletion of object from S3 bucket.
 	AddContentDisposition bool
 	FileName              string
 }
@@ -112,6 +112,7 @@ func (s SessionWithHelpers) UploadWithSettings(data []byte, bucket, fileName str
 		Body:        bytes.NewReader(data),
 	}
 
+	// This sets the expiry date of the download link, not the deletion date of the object in the bucket.
 	if settings.ExpiryDuration != nil {
 		expiry := time.Now().Add(*settings.ExpiryDuration)
 		putInput.Expires = &expiry
@@ -142,25 +143,6 @@ func (s SessionWithHelpers) UploadWithSettings(data []byte, bucket, fileName str
 	return "", nil
 }
 
-func (s SessionWithHelpers) UploadWith1DayExpiry(data []byte, bucket, fileName string, mimeType MIMEType, shouldDownloadInsteadOfOpen bool) (string, error) {
-	if mimeType == "" {
-		mimeType = getTypeForFilename(fileName)
-	}
-
-	expiry := 24 * time.Hour
-	signedUrl, err := s.UploadWithSettings(data, bucket, fileName, S3UploadSettings{
-		MimeType:              mimeType,
-		RetrieveSignedUrl:     true,
-		ExpiryDuration:        &expiry,
-		AddContentDisposition: shouldDownloadInsteadOfOpen,
-	})
-	if err != nil {
-		return "", err
-	}
-
-	return signedUrl, nil
-}
-
 // GetSignedDownloadURL gets a signed download URL for the duration. If scv is nil, a new session will be created.
 func (s SessionWithHelpers) GetSignedDownloadURL(bucket string, fileName string, duration time.Duration, headers ...map[string]string) (string, error) {
 	getInput := &s3.GetObjectInput{