⚠️ Program Limitations
This document outlines the current technical constraints, functional limitations, and performance considerations of FastMediaSorter v2.
📱 System Requirements
- Android Version: Android 9.0 (API 28) or newer is required.
- Hardware: Performance may vary based on device CPU and RAM, especially for large collections (5000+ files).
- Storage Access: Full functionality requires the “All Files Access” (MANAGE_EXTERNAL_STORAGE) permission on newer Android versions.
🌐 Network & Cloud Limitations
Protocol Support
- SMB: Best performance on local Wi-Fi. Supports SMB v2/v3 (v1 is deprecated but may work in some configurations).
- Cloud (Google Drive, OneDrive, Dropbox): Files are streamed/cached on demand. There is no background sync for offline use.
- Undo Operation: The “Undo” feature for move/delete operations is NOT available for network and cloud resources. Once deleted, they are gone (unless the server provides its own trash bin).
Internet Requirement
- Local Files: Works completely offline.
- Network/Cloud: Requires an active connection.
- OCR/Translation: Requires a one-time internet connection to download language models (~15-50 MB depending on the language).
📂 File & Media Support
Formats & Codecs
- Images: JPG, JPEG, PNG, GIF, BMP, WEBP, HEIC, HEIF, AVIF. RAW formats (CR2, NEF, ARW, DNG, etc.) are NOT supported.
- Videos: MP4, MKV, MOV, WMV, FLV, WEBM, TS, M2TS, VOB, OGV, DIVX, MTS and more. If a file uses an unsupported codec (e.g., HEVC on older devices), you may see a black screen. Solution: Use the “Open in External Player” option.
- Text: Large text files (>100MB) may load slowly in the internal viewer.
- EPUB: Supports DRM-free EPUB files only. Encrypted or DRM-protected books will not open.
Large Collections
- Performance: Folders with 5000+ files may experience scrolling lag while thumbnails are generating.
- Thumbnail Cache: Limited to 2GB by default (configurable in settings).
🛠️ Functional Constraints
Favorites
- Local Only: Favorites are stored in a local database on your device. They are not synced to the actual files or across different devices.
Trash System
- Soft Delete: Local files are moved to a hidden
.trash/folder. This takes up space until you manually select “Empty Trash” in settings.
Wear OS App
- Limited Scope: The Wear OS companion app currently supports local media only. Network and cloud resources are not accessible from the watch.
- Performance: Image and video processing on watches is significantly slower than on phones.
VR Edition
- Hardware: Runs only on Meta Quest 2/3/Pro and Android XR headsets (
arm64-v8a+ OpenXR runtime). On a phone without an XR runtime, the app shows a fallback screen and does not start playback. - Distribution: Two channels - Meta Horizon Store / Google Play (
vrflavor, Store-clean: no GPL extractors / no yt-dlp) and ADB sideload (noLegalflavor, all-inclusive: VR + Python + yt-dlp + GPL extractors, runtime-gated on non-XR devices). - No Wear OS Companion: headsets have no paired watch.
- See VR Edition for the full constraint list.
🧩 AI & OCR Models
- Engines: The app uses a hybrid engine (ML Kit + Tesseract).
- Latencies: Tesseract (for Cyrillic) initialization takes 1-2 seconds longer than ML Kit.
- Accuracy: Recognition quality depends heavily on image clarity and lighting.
Last Update: February 2026 Version: v2.26.0224