diff --git a/native/native_rust_library/src/backup/upload_handler.rs b/native/native_rust_library/src/backup/upload_handler.rs
index 92ffe12f9..243f138cd 100644
--- a/native/native_rust_library/src/backup/upload_handler.rs
+++ b/native/native_rust_library/src/backup/upload_handler.rs
@@ -1,231 +1,317 @@
 use super::file_info::BackupFileInfo;
 use super::get_user_identity_from_secure_store;
 use crate::constants::BACKUP_SERVICE_CONNECTION_RETRY_DELAY;
 use crate::ffi::{
-  get_backup_directory_path, get_backup_file_path,
+  get_backup_directory_path, get_backup_file_path, get_backup_log_file_path,
   get_backup_user_keys_file_path,
 };
 use crate::BACKUP_SOCKET_ADDR;
 use crate::RUNTIME;
-use backup_client::BackupData;
 use backup_client::UserIdentity;
 use backup_client::{
   BackupClient, Error as BackupError, LogUploadConfirmation, Stream, StreamExt,
   WSError,
 };
+use backup_client::{BackupData, Sink, UploadLogRequest};
 use lazy_static::lazy_static;
+use std::collections::HashSet;
 use std::convert::Infallible;
 use std::error::Error;
 use std::future::Future;
 use std::io::BufRead;
 use std::io::ErrorKind;
 use std::path::PathBuf;
 use std::pin::Pin;
 use std::sync::{Arc, Mutex};
 use tokio::sync::Notify;
 use tokio::task::JoinHandle;
 
 lazy_static! {
   pub static ref UPLOAD_HANDLER: Arc<Mutex<Option<JoinHandle<Infallible>>>> =
     Arc::new(Mutex::new(None));
   static ref TRIGGER_BACKUP_FILE_UPLOAD: Arc<Notify> = Arc::new(Notify::new());
   static ref BACKUP_FOLDER_PATH: PathBuf = PathBuf::from(
     get_backup_directory_path().expect("Getting backup directory path failed")
   );
 }
 
 pub mod ffi {
   use super::*;
 
   pub fn start_backup_handler() -> Result<(), Box<dyn Error>> {
     let mut handle = UPLOAD_HANDLER.lock()?;
     match handle.take() {
       // Don't start backup handler if it's already running
       Some(handle) if !handle.is_finished() => (),
       _ => {
         *handle = Some(RUNTIME.spawn(super::start()?));
       }
     }
 
     Ok(())
   }
 
   pub fn stop_backup_handler() -> Result<(), Box<dyn Error>> {
     let Some(handler) = UPLOAD_HANDLER.lock()?.take() else {
       return Ok(());
     };
     if handler.is_finished() {
       return Ok(());
     }
 
     handler.abort();
     Ok(())
   }
 
   pub fn trigger_backup_file_upload() {
     TRIGGER_BACKUP_FILE_UPLOAD.notify_one();
   }
 }
 
 pub fn start() -> Result<impl Future<Output = Infallible>, Box<dyn Error>> {
   let backup_client = BackupClient::new(BACKUP_SOCKET_ADDR)?;
   let user_identity = get_user_identity_from_secure_store()?;
 
   Ok(async move {
     loop {
       let (tx, rx) = match backup_client.upload_logs(&user_identity).await {
         Ok(ws) => ws,
         Err(err) => {
           println!(
             "Backup handler error when estabilishing connection: '{err:?}'"
           );
           tokio::time::sleep(BACKUP_SERVICE_CONNECTION_RETRY_DELAY).await;
           continue;
         }
       };
 
-      let mut _tx = Box::pin(tx);
+      let mut tx = Box::pin(tx);
       let mut rx = Box::pin(rx);
 
+      let logs_waiting_for_confirmation = Mutex::new(HashSet::<PathBuf>::new());
+
       loop {
         let err = tokio::select! {
-          Err(err) = watch_and_upload_files(&backup_client, &user_identity) => err,
-          Err(err) = delete_confirmed_logs(&mut rx) => err,
+          Err(err) = watch_and_upload_files(&backup_client, &user_identity, &mut tx, &logs_waiting_for_confirmation) => err,
+          Err(err) = delete_confirmed_logs(&mut rx, &logs_waiting_for_confirmation) => err,
         };
 
         println!("Backup handler error: '{err:?}'");
         match err {
           BackupHandlerError::BackupError(_)
           | BackupHandlerError::BackupWSError(_)
-          | BackupHandlerError::WSClosed => break,
+          | BackupHandlerError::WSClosed
+          | BackupHandlerError::LockError => break,
           BackupHandlerError::IoError(_)
           | BackupHandlerError::CxxException(_) => continue,
         }
       }
 
       tokio::time::sleep(BACKUP_SERVICE_CONNECTION_RETRY_DELAY).await;
       println!("Retrying backup log upload");
     }
   })
 }
 
 async fn watch_and_upload_files(
   backup_client: &BackupClient,
   user_identity: &UserIdentity,
+  tx: &mut Pin<Box<impl Sink<UploadLogRequest, Error = WSError>>>,
+  logs_waiting_for_confirmation: &Mutex<HashSet<PathBuf>>,
 ) -> Result<Infallible, BackupHandlerError> {
   loop {
     let mut file_stream = match tokio::fs::read_dir(&*BACKUP_FOLDER_PATH).await
     {
       Ok(file_stream) => file_stream,
       Err(err) if err.kind() == ErrorKind::NotFound => {
         TRIGGER_BACKUP_FILE_UPLOAD.notified().await;
         continue;
       }
       Err(err) => return Err(err.into()),
     };
 
     while let Some(file) = file_stream.next_entry().await? {
       let path = file.path();
 
+      if logs_waiting_for_confirmation.lock()?.contains(&path) {
+        continue;
+      }
+
       let Ok(BackupFileInfo {
         backup_id,
         log_id,
         additional_data,
-      }) = path.try_into()
+      }) = path.clone().try_into()
       else {
         continue;
       };
 
       // Skip additional data files (attachments, user keys). They will be
       // handled when we iterate over the corresponding files with the
       // main content
       if additional_data.is_some() {
         continue;
       }
 
-      if let Some(_) = log_id {
+      if let Some(log_id) = log_id {
+        log::upload_files(tx, backup_id, log_id).await?;
+        logs_waiting_for_confirmation.lock()?.insert(path);
       } else {
         compaction::upload_files(backup_client, user_identity, backup_id)
           .await?;
       }
     }
 
     TRIGGER_BACKUP_FILE_UPLOAD.notified().await;
   }
 }
 
 async fn delete_confirmed_logs(
   rx: &mut Pin<Box<impl Stream<Item = Result<LogUploadConfirmation, WSError>>>>,
+  logs_waiting_for_confirmation: &Mutex<HashSet<PathBuf>>,
 ) -> Result<Infallible, BackupHandlerError> {
-  while let Some(_) = rx.next().await.transpose()? {}
+  while let Some(LogUploadConfirmation { backup_id, log_id }) =
+    rx.next().await.transpose()?
+  {
+    let path =
+      get_backup_log_file_path(&backup_id, &log_id.to_string(), false)?;
+    logs_waiting_for_confirmation
+      .lock()?
+      .remove(&PathBuf::from(path));
+
+    tokio::spawn(log::cleanup_files(backup_id, log_id));
+  }
 
   Err(BackupHandlerError::WSClosed)
 }
 
 mod compaction {
   use super::*;
 
   pub async fn upload_files(
     backup_client: &BackupClient,
     user_identity: &UserIdentity,
     backup_id: String,
   ) -> Result<(), BackupHandlerError> {
     let user_data_path = get_backup_file_path(&backup_id, false)?;
     let user_data = tokio::fs::read(&user_data_path).await?;
 
     let user_keys_path = get_backup_user_keys_file_path(&backup_id)?;
     let user_keys = tokio::fs::read(&user_keys_path).await?;
 
     let attachments_path = get_backup_file_path(&backup_id, true)?;
     let attachments = match tokio::fs::read(&attachments_path).await {
       Ok(data) => data.lines().collect::<Result<_, _>>()?,
       Err(err) if err.kind() == ErrorKind::NotFound => Vec::new(),
       Err(err) => return Err(err.into()),
     };
 
     let backup_data = BackupData {
       backup_id: backup_id.clone(),
       user_data,
       user_keys,
       attachments,
     };
 
     backup_client
       .upload_backup(user_identity, backup_data)
       .await?;
 
     tokio::spawn(cleanup_files(backup_id));
 
     Ok(())
   }
 
   pub async fn cleanup_files(backup_id: String) {
     let backup_files_cleanup = async {
       let user_data_path = get_backup_file_path(&backup_id, false)?;
       tokio::fs::remove_file(&user_data_path).await?;
       let user_keys_path = get_backup_user_keys_file_path(&backup_id)?;
       tokio::fs::remove_file(&user_keys_path).await?;
       let attachments_path = get_backup_file_path(&backup_id, true)?;
       match tokio::fs::remove_file(&attachments_path).await {
         Ok(()) => Result::<_, Box<dyn Error>>::Ok(()),
         Err(err) if err.kind() == ErrorKind::NotFound => Ok(()),
         Err(err) => Err(err.into()),
       }
     };
 
     if let Err(err) = backup_files_cleanup.await {
       println!("Error when cleaning up the backup files: {err:?}");
     }
   }
 }
 
+mod log {
+  use backup_client::SinkExt;
+
+  use super::*;
+
+  pub async fn upload_files(
+    tx: &mut Pin<Box<impl Sink<UploadLogRequest, Error = WSError>>>,
+    backup_id: String,
+    log_id: usize,
+  ) -> Result<(), BackupHandlerError> {
+    let log_id_string = log_id.to_string();
+    let content_path =
+      get_backup_log_file_path(&backup_id, &log_id_string, false)?;
+    let content = tokio::fs::read(&content_path).await?;
+
+    let attachments_path =
+      get_backup_log_file_path(&backup_id, &log_id_string, true)?;
+    let attachments = match tokio::fs::read(&attachments_path).await {
+      Ok(data) => Some(data.lines().collect::<Result<_, _>>()?),
+      Err(err) if err.kind() == ErrorKind::NotFound => None,
+      Err(err) => return Err(err.into()),
+    };
+
+    let log_data = UploadLogRequest {
+      backup_id,
+      log_id,
+      content,
+      attachments,
+    };
+    tx.send(log_data.clone()).await?;
+
+    Ok(())
+  }
+
+  pub async fn cleanup_files(backup_id: String, log_id: usize) {
+    let backup_files_cleanup = async {
+      let log_id = log_id.to_string();
+
+      let path = get_backup_log_file_path(&backup_id, &log_id, false)?;
+      tokio::fs::remove_file(&path).await?;
+
+      let attachments_path =
+        get_backup_log_file_path(&backup_id, &log_id, true)?;
+      match tokio::fs::remove_file(&attachments_path).await {
+        Ok(()) => Result::<_, Box<dyn Error>>::Ok(()),
+        Err(err) if err.kind() == ErrorKind::NotFound => Ok(()),
+        Err(err) => Err(err.into()),
+      }
+    };
+
+    if let Err(err) = backup_files_cleanup.await {
+      println!("{err:?}");
+    }
+  }
+}
+
 #[derive(
   Debug, derive_more::Display, derive_more::From, derive_more::Error,
 )]
 pub enum BackupHandlerError {
   BackupError(BackupError),
   BackupWSError(WSError),
   WSClosed,
   IoError(std::io::Error),
   CxxException(cxx::Exception),
+  LockError,
+}
+
+impl<T> From<std::sync::PoisonError<T>> for BackupHandlerError {
+  fn from(_: std::sync::PoisonError<T>) -> Self {
+    Self::LockError
+  }
 }