diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt b/app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt
index 24583d4c39..6f5f23958b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.kt
@@ -7,8 +7,8 @@ import com.google.gson.Gson
 import com.jakewharton.disklrucache.DiskLruCache
 import eu.kanade.tachiyomi.data.database.models.Chapter
 import eu.kanade.tachiyomi.source.model.Page
-import eu.kanade.tachiyomi.util.DiskUtil
-import eu.kanade.tachiyomi.util.saveTo
+import eu.kanade.tachiyomi.util.storage.DiskUtil
+import eu.kanade.tachiyomi.util.storage.saveTo
 import okhttp3.Response
 import okio.Okio
 import okio.buffer
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt b/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt
index 96db0846bd..479ad00c24 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt
@@ -1,11 +1,7 @@
 package eu.kanade.tachiyomi.data.cache
 
 import android.content.Context
-import eu.kanade.tachiyomi.data.database.models.Manga
-import eu.kanade.tachiyomi.util.DiskUtil
-import eu.kanade.tachiyomi.util.launchUI
-import kotlinx.coroutines.cancel
-import kotlinx.coroutines.delay
+import eu.kanade.tachiyomi.util.storage.DiskUtil
 import java.io.File
 import java.io.IOException
 import java.io.InputStream
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt
index 7846e57a43..075c677c61 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadCache.kt
@@ -9,7 +9,7 @@ import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.source.SourceManager
-import eu.kanade.tachiyomi.util.DiskUtil
+import eu.kanade.tachiyomi.util.storage.DiskUtil
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 import uy.kohesive.injekt.injectLazy
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
index f7f825c644..03990d25ba 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadProvider.kt
@@ -11,7 +11,7 @@ import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.source.SourceManager
-import eu.kanade.tachiyomi.util.DiskUtil
+import eu.kanade.tachiyomi.util.storage.DiskUtil
 import uy.kohesive.injekt.injectLazy
 
 /**
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
index de16ea9e76..a59df9f1d5 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt
@@ -1,7 +1,6 @@
 package eu.kanade.tachiyomi.data.download
 
 import android.content.Context
-import android.net.Uri
 import android.webkit.MimeTypeMap
 import com.hippo.unifile.UniFile
 import com.jakewharton.rxrelay.BehaviorRelay
@@ -15,13 +14,13 @@ import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.source.online.fetchAllImageUrlsFromPageList
-import eu.kanade.tachiyomi.util.DiskUtil
 import eu.kanade.tachiyomi.util.ImageUtil
 import eu.kanade.tachiyomi.util.RetryWithDelay
 import eu.kanade.tachiyomi.util.launchNow
 import eu.kanade.tachiyomi.util.launchUI
 import eu.kanade.tachiyomi.util.plusAssign
-import eu.kanade.tachiyomi.util.saveTo
+import eu.kanade.tachiyomi.util.storage.DiskUtil
+import eu.kanade.tachiyomi.util.storage.saveTo
 import kotlinx.coroutines.async
 import okhttp3.Response
 import rx.Observable
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationHandler.kt b/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationHandler.kt
index 4c61ca4eea..2f474f3f5a 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationHandler.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationHandler.kt
@@ -5,7 +5,7 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import eu.kanade.tachiyomi.ui.main.MainActivity
-import eu.kanade.tachiyomi.util.getUriCompat
+import eu.kanade.tachiyomi.util.storage.getUriCompat
 import java.io.File
 
 /**
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt b/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt
index 296dabbeb8..683bb227fd 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt
@@ -23,8 +23,8 @@ import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.ui.main.MainActivity
 import eu.kanade.tachiyomi.ui.manga.MangaController
 import eu.kanade.tachiyomi.ui.reader.ReaderActivity
-import eu.kanade.tachiyomi.util.DiskUtil
-import eu.kanade.tachiyomi.util.getUriCompat
+import eu.kanade.tachiyomi.util.storage.DiskUtil
+import eu.kanade.tachiyomi.util.storage.getUriCompat
 import eu.kanade.tachiyomi.util.notificationManager
 import eu.kanade.tachiyomi.util.toast
 import uy.kohesive.injekt.Injekt
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterService.kt b/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterService.kt
index 5dd8dee2eb..7de94fd306 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/updater/UpdaterService.kt
@@ -10,8 +10,8 @@ import eu.kanade.tachiyomi.network.GET
 import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.network.ProgressListener
 import eu.kanade.tachiyomi.network.newCallWithProgress
-import eu.kanade.tachiyomi.util.getUriCompat
-import eu.kanade.tachiyomi.util.saveTo
+import eu.kanade.tachiyomi.util.storage.getUriCompat
+import eu.kanade.tachiyomi.util.storage.saveTo
 import timber.log.Timber
 import uy.kohesive.injekt.injectLazy
 import java.io.File
diff --git a/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstaller.kt b/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstaller.kt
index b2e2086a22..8c444a98ee 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstaller.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/extension/util/ExtensionInstaller.kt
@@ -10,7 +10,7 @@ import android.os.Build
 import com.jakewharton.rxrelay.PublishRelay
 import eu.kanade.tachiyomi.extension.model.Extension
 import eu.kanade.tachiyomi.extension.model.InstallStep
-import eu.kanade.tachiyomi.util.getUriCompat
+import eu.kanade.tachiyomi.util.storage.getUriCompat
 import rx.Observable
 import rx.android.schedulers.AndroidSchedulers
 import timber.log.Timber
diff --git a/app/src/main/java/eu/kanade/tachiyomi/source/LocalSource.kt b/app/src/main/java/eu/kanade/tachiyomi/source/LocalSource.kt
index bba5eec640..3ae90e0bcd 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/source/LocalSource.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/source/LocalSource.kt
@@ -13,8 +13,8 @@ import eu.kanade.tachiyomi.source.model.SChapter
 import eu.kanade.tachiyomi.source.model.SManga
 import eu.kanade.tachiyomi.util.ChapterRecognition
 import eu.kanade.tachiyomi.util.ComparatorUtil.CaseInsensitiveNaturalComparator
-import eu.kanade.tachiyomi.util.DiskUtil
-import eu.kanade.tachiyomi.util.EpubFile
+import eu.kanade.tachiyomi.util.storage.DiskUtil
+import eu.kanade.tachiyomi.util.storage.EpubFile
 import eu.kanade.tachiyomi.util.ImageUtil
 import junrar.Archive
 import junrar.rarfile.FileHeader
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoPresenter.kt
index 48205897db..eb9c0f668f 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/info/MangaInfoPresenter.kt
@@ -18,7 +18,7 @@ import eu.kanade.tachiyomi.source.LocalSource
 import eu.kanade.tachiyomi.source.Source
 import eu.kanade.tachiyomi.source.model.SManga
 import eu.kanade.tachiyomi.ui.base.presenter.BasePresenter
-import eu.kanade.tachiyomi.util.DiskUtil
+import eu.kanade.tachiyomi.util.storage.DiskUtil
 import eu.kanade.tachiyomi.util.isNullOrUnsubscribed
 import rx.Observable
 import rx.Subscription
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
index a7095ab489..0cc70f9f5e 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
@@ -47,12 +47,12 @@ import eu.kanade.tachiyomi.ui.reader.viewer.pager.VerticalPagerViewer
 import eu.kanade.tachiyomi.ui.reader.viewer.webtoon.WebtoonViewer
 import eu.kanade.tachiyomi.util.GLUtil
 import eu.kanade.tachiyomi.util.getResourceColor
-import eu.kanade.tachiyomi.util.getUriCompat
 import eu.kanade.tachiyomi.util.gone
 import eu.kanade.tachiyomi.util.launchUI
 import eu.kanade.tachiyomi.util.plusAssign
 import eu.kanade.tachiyomi.util.toast
 import eu.kanade.tachiyomi.util.visible
+import eu.kanade.tachiyomi.util.storage.getUriCompat
 import eu.kanade.tachiyomi.widget.SimpleAnimationListener
 import eu.kanade.tachiyomi.widget.SimpleSeekBarListener
 import kotlinx.android.synthetic.main.reader_activity.*
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt
index bf6d419714..fb854a8d14 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt
@@ -22,7 +22,7 @@ import eu.kanade.tachiyomi.ui.reader.loader.DownloadPageLoader
 import eu.kanade.tachiyomi.ui.reader.model.ReaderChapter
 import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
 import eu.kanade.tachiyomi.ui.reader.model.ViewerChapters
-import eu.kanade.tachiyomi.util.DiskUtil
+import eu.kanade.tachiyomi.util.storage.DiskUtil
 import eu.kanade.tachiyomi.util.ImageUtil
 import rx.Completable
 import rx.Observable
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/EpubPageLoader.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/EpubPageLoader.kt
index 76965b645c..43e9348c3b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/EpubPageLoader.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/reader/loader/EpubPageLoader.kt
@@ -2,7 +2,7 @@ package eu.kanade.tachiyomi.ui.reader.loader
 
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.ui.reader.model.ReaderPage
-import eu.kanade.tachiyomi.util.EpubFile
+import eu.kanade.tachiyomi.util.storage.EpubFile
 import rx.Observable
 import java.io.File
 
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/PreferenceExtensions.kt b/app/src/main/java/eu/kanade/tachiyomi/util/PreferenceExtensions.kt
new file mode 100644
index 0000000000..34e1e0557a
--- /dev/null
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/PreferenceExtensions.kt
@@ -0,0 +1,42 @@
+package eu.kanade.tachiyomi.util
+
+import android.content.SharedPreferences
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.channels.awaitClose
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.flow.flowOn
+import kotlin.coroutines.CoroutineContext
+
+@ExperimentalCoroutinesApi
+inline fun <reified T> SharedPreferences.getKey(key: String, default: T, dispatcher: CoroutineContext = Dispatchers.Default): Flow<T> {
+    val flow: Flow<T> = channelFlow {
+        offer(getItem(key, default))
+
+        val listener = SharedPreferences.OnSharedPreferenceChangeListener { _, k ->
+            if (key == k) {
+                offer(getItem(key, default)!!)
+            }
+        }
+
+        registerOnSharedPreferenceChangeListener(listener)
+        awaitClose { unregisterOnSharedPreferenceChangeListener(listener) }
+    }
+    return flow
+            .flowOn(dispatcher)
+}
+
+inline fun <reified T> SharedPreferences.getItem(key: String, default: T): T {
+    @Suppress("UNCHECKED_CAST")
+    return when (default) {
+        is String -> getString(key, default) as T
+        is Int -> getInt(key, default) as T
+        is Long -> getLong(key, default) as T
+        is Boolean -> getBoolean(key, default) as T
+        is Float -> getFloat(key, default) as T
+        is Set<*> -> getStringSet(key, default as Set<String>) as T
+        is MutableSet<*> -> getStringSet(key, default as MutableSet<String>) as T
+        else -> throw IllegalArgumentException("Generic type not handled: ${T::class.java.name}")
+    }
+}
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/DiskUtil.kt b/app/src/main/java/eu/kanade/tachiyomi/util/storage/DiskUtil.kt
similarity index 97%
rename from app/src/main/java/eu/kanade/tachiyomi/util/DiskUtil.kt
rename to app/src/main/java/eu/kanade/tachiyomi/util/storage/DiskUtil.kt
index e089c9ebc9..41dbea8301 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/DiskUtil.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/storage/DiskUtil.kt
@@ -1,4 +1,4 @@
-package eu.kanade.tachiyomi.util
+package eu.kanade.tachiyomi.util.storage
 
 import android.content.Context
 import android.content.Intent
@@ -7,6 +7,7 @@ import android.os.Environment
 import androidx.core.content.ContextCompat
 import androidx.core.os.EnvironmentCompat
 import com.hippo.unifile.UniFile
+import eu.kanade.tachiyomi.util.Hash
 import java.io.File
 
 object DiskUtil {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/EpubFile.kt b/app/src/main/java/eu/kanade/tachiyomi/util/storage/EpubFile.kt
similarity index 98%
rename from app/src/main/java/eu/kanade/tachiyomi/util/EpubFile.kt
rename to app/src/main/java/eu/kanade/tachiyomi/util/storage/EpubFile.kt
index f1c81b5b83..4727e56351 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/EpubFile.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/storage/EpubFile.kt
@@ -1,4 +1,4 @@
-package eu.kanade.tachiyomi.util
+package eu.kanade.tachiyomi.util.storage
 
 import org.jsoup.Jsoup
 import org.jsoup.nodes.Document
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/FileExtensions.kt b/app/src/main/java/eu/kanade/tachiyomi/util/storage/FileExtensions.kt
similarity index 92%
rename from app/src/main/java/eu/kanade/tachiyomi/util/FileExtensions.kt
rename to app/src/main/java/eu/kanade/tachiyomi/util/storage/FileExtensions.kt
index 98fe9bfbb1..2b2ad5843c 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/FileExtensions.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/storage/FileExtensions.kt
@@ -1,4 +1,4 @@
-package eu.kanade.tachiyomi.util
+package eu.kanade.tachiyomi.util.storage
 
 import android.content.Context
 import android.net.Uri
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/OkioExtensions.kt b/app/src/main/java/eu/kanade/tachiyomi/util/storage/OkioExtensions.kt
similarity index 95%
rename from app/src/main/java/eu/kanade/tachiyomi/util/OkioExtensions.kt
rename to app/src/main/java/eu/kanade/tachiyomi/util/storage/OkioExtensions.kt
index 5db31230e7..85bd0c3245 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/OkioExtensions.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/storage/OkioExtensions.kt
@@ -1,4 +1,4 @@
-package eu.kanade.tachiyomi.util
+package eu.kanade.tachiyomi.util.storage
 
 import okio.BufferedSource
 import okio.Okio