---
id: object/codeunit/9454
type: object
title: Codeunit 9454 "External File Storage"
summary: Codeunit 9454 "External File Storage" in System Application (System.ExternalFileStorage). 23 public procedures. Introduced in BC26, still in BC30.
tier: official
language: en
tags:
  - codeunit
  - system application
versions:
  introduced: "26"
  last_changed: null
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: bbf31abf9624a14cf8b26339a459a12b1f79f128d6047ec4bed57f2511d79dd0
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/System%20Application/App/External%20File%20Storage/src/FileStorage/ExternalFileStorage.Codeunit.al
    title: src/System Application/App/External File Storage/src/FileStorage/ExternalFileStorage.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
    t: null
    quote: null
links:
  learn: []
  objects: []
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
object_type: codeunit
object_id: 9454
name: External File Storage
namespace: System.ExternalFileStorage
app: System Application
extends: null
first_version: "26"
last_version: "30"
present_in:
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 23
  events: 0
  subscribers: 0
relations:
  out: 0
  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 1
  called_by: 2
  implements: 0
---

# Codeunit 9454 "External File Storage"

> Codeunit 9454 "External File Storage" in System Application (System.ExternalFileStorage). 23 public procedures. Introduced in BC26, still in BC30.

System Application · System.ExternalFileStorage · BC26-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/System%20Application/App/External%20File%20Storage/src/FileStorage/ExternalFileStorage.Codeunit.al) · facts from BC29

## Procedures

- `Initialize(Scenario: Enum "File Scenario")`: Initializes the File Storage for the given scenario.
- `Initialize(TempFileAccount: Record "File Account" temporary)`: Initializes the File Storage for the give file account.
- `ListFiles(Path: Text; FilePaginationData: Codeunit "File Pagination Data"; var TempFileAccountContent: Record "File Account Content" temporary)`: List all files from the given path.
- `GetFile(Path: Text; Stream: InStream)`: Retrieves a file from the file account.
- `CreateFile(Path: Text; Stream: InStream)`: Stores a file in to the file account.
- `CopyFile(SourcePath: Text; TargetPath: Text)`: Copies a file in the file account.
- `MoveFile(SourcePath: Text; TargetPath: Text)`: Moves a file in the file account.
- `FileExists(Path: Text): Boolean`: Checks if a specific file exists in the file account.
- `DeleteFile(Path: Text)`: Deletes a file from the file account.
- `ListDirectories(Path: Text; FilePaginationData: Codeunit "File Pagination Data"; var TempFileAccountContent: Record "File Account Content" temporary)`: List all directories from the given path.
- `CreateDirectory(Path: Text)`: Creates a directory in the file account.
- `DirectoryExists(Path: Text): Boolean`: Checks if a specific directory exists in the file account.
- `DeleteDirectory(Path: Text)`: Deletes a directory from the file account.
- `CombinePath(Path: Text; ChildPath: Text): Text`: Combines to paths together.
- `GetParentPath(Path: Text): Text`: Gets the Parent Path of the given path.
- `SelectAndGetFolderPath(Path: Text): Text`: Opens a folder selection dialog.
- `SelectAndGetFolderPath(Path: Text; DialogTitle: Text): Text`: Opens a folder selection dialog.
- `SelectAndGetFilePath(Path: Text; FileFilter: Text): Text`: Opens a select file dialog.
- `SelectAndGetFilePath(Path: Text; FileFilter: Text; DialogTitle: Text): Text`: Opens a select file dialog.
- `SaveFile(Path: Text; FileExtension: Text): Text`: Opens a save to dialog.
- `SaveFile(Path: Text; FileExtension: Text; DialogTitle: Text): Text`: Opens a save to dialog.
- `SaveFile(Path: Text; FileNameSuggestion: Text; FileExtension: Text; DialogTitle: Text): Text`: Opens a save to dialog.
- `BrowseAccount()`: Opens a File Browser

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 9455 "External File Storage Impl."](../codeunit/9455.md) (15 calls: `BrowseAccount → BrowseAccount`, `CombinePath → CombinePath`, `CopyFile → CopyFile`, …)

## Called by

- [Codeunit 8751 "DA External Storage Impl."](../codeunit/8751.md) (20 calls: `DeleteExternalFile → DeleteFile`, `DeleteExternalFile → Initialize`, `DownloadFromExternalStorage → GetFile`, …)
- [Codeunit 9458 "File Account Browser Mgt."](../codeunit/9458.md) (14 calls: `AddParentFolder → GetParentPath`, `BrowseFolder → ListDirectories`, `CombinePath → CombinePath`, …)

## Across versions

- Present in: BC26-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "codeunit", object_name: "External File Storage")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.