diff --git a/app/src/main/java/com/droiddeck/launcher/stores/StoreInstallRoot.kt b/app/src/main/java/com/droiddeck/launcher/stores/StoreInstallRoot.kt
index a7cb3f15d..09bf3c61f 100644
--- a/app/src/main/java/com/droiddeck/launcher/stores/StoreInstallRoot.kt
+++ b/app/src/main/java/com/droiddeck/launcher/stores/StoreInstallRoot.kt
@@ -33,9 +33,6 @@ object StoreInstallRoot {
         val enough: Boolean,
         val requiredBytes: Long,
         val availableBytes: Long,
-        val internalRequiredBytes: Long = 0L,
-        val internalAvailableBytes: Long = 0L,
-        val isInternalShortage: Boolean = false,
         val errorMessage: String? = null
     )
 
@@ -48,58 +45,21 @@ object StoreInstallRoot {
     }
 
     /**
-     * Estimated bytes needed for an install. Epic on internal storage needs both chunk cache
-     * and assembled files simultaneously (~2x game size).
+     * The catalog size is the known minimum for an install. Epic's actual chunk-cache requirement
+     * is determined from its manifest before chunk downloads begin.
      */
-    fun estimatedBytesNeeded(item: CatalogItem, targetRoot: File, isInternal: Boolean): Long {
-        val size = StoreSizes.size(item)
-        if (size <= 0L) return 0L
-        return if (item.store == Store.EPIC && isInternal) size * 2 else size
-    }
+    fun estimatedBytesNeeded(item: CatalogItem): Long = StoreSizes.size(item).coerceAtLeast(0L)
 
     /** Pre-install storage check to detect insufficient space before starting. */
     fun checkStorage(context: Context, item: CatalogItem, targetRoot: File): StorageCheck {
-        val size = StoreSizes.size(item)
+        val size = estimatedBytesNeeded(item)
         val freeTarget = availableBytes(targetRoot)
         if (size <= 0L) return StorageCheck(enough = true, requiredBytes = 0L, availableBytes = freeTarget)
-        val internal = isInternal(context, targetRoot)
-        if (internal) {
-            val needed = if (item.store == Store.EPIC) size * 2 else size
-            if (freeTarget in 1 until needed) {
-                val msg = if (item.store == Store.EPIC) {
-                    context.getString(
-                        com.droiddeck.launcher.R.string.stores_storage_insufficient,
-                        formatBytes(needed),
-                        formatBytes(freeTarget)
-                    ) + " (" + formatBytes(size) + " + " + formatBytes(size) + " " + context.getString(com.droiddeck.launcher.R.string.stores_stage_download).lowercase() + ")"
-                } else {
-                    context.getString(com.droiddeck.launcher.R.string.stores_storage_insufficient, formatBytes(needed), formatBytes(freeTarget))
-                }
-                return StorageCheck(enough = false, requiredBytes = needed, availableBytes = freeTarget, errorMessage = msg)
-            }
-            return StorageCheck(enough = true, requiredBytes = needed, availableBytes = freeTarget)
-        } else {
-            if (freeTarget in 1 until size) {
-                val msg = context.getString(com.droiddeck.launcher.R.string.stores_storage_insufficient, formatBytes(size), formatBytes(freeTarget))
-                return StorageCheck(enough = false, requiredBytes = size, availableBytes = freeTarget, errorMessage = msg)
-            }
-            if (item.store == Store.EPIC) {
-                val internalFree = availableBytes(context.cacheDir)
-                if (internalFree in 1 until size) {
-                    val msg = context.getString(com.droiddeck.launcher.R.string.stores_storage_internal_cache_insufficient, formatBytes(size), formatBytes(internalFree))
-                    return StorageCheck(
-                        enough = false,
-                        requiredBytes = size,
-                        availableBytes = freeTarget,
-                        internalRequiredBytes = size,
-                        internalAvailableBytes = internalFree,
-                        isInternalShortage = true,
-                        errorMessage = msg
-                    )
-                }
-            }
-            return StorageCheck(enough = true, requiredBytes = size, availableBytes = freeTarget)
+        if (freeTarget in 1 until size) {
+            val msg = context.getString(com.droiddeck.launcher.R.string.stores_storage_insufficient, formatBytes(size), formatBytes(freeTarget))
+            return StorageCheck(enough = false, requiredBytes = size, availableBytes = freeTarget, errorMessage = msg)
         }
+        return StorageCheck(enough = true, requiredBytes = size, availableBytes = freeTarget)
     }
 
     /** The internal root: always there, always the default. */
diff --git a/app/src/main/java/com/droiddeck/launcher/ui/StoresInstallDialog.kt b/app/src/main/java/com/droiddeck/launcher/ui/StoresInstallDialog.kt
index 4cc53ae2f..703ba2058 100644
--- a/app/src/main/java/com/droiddeck/launcher/ui/StoresInstallDialog.kt
+++ b/app/src/main/java/com/droiddeck/launcher/ui/StoresInstallDialog.kt
@@ -72,7 +72,7 @@ internal fun InstallWhereDialog(item: CatalogItem, onDismiss: () -> Unit) {
         Rise(1) {
             Column(verticalArrangement = Arrangement.spacedBy(8.dp), modifier = Modifier.fillMaxWidth()) {
                 targets.forEachIndexed { i, t ->
-                    val needed = com.droiddeck.launcher.stores.StoreInstallRoot.estimatedBytesNeeded(item, t.root, !t.removable)
+                    val needed = com.droiddeck.launcher.stores.StoreInstallRoot.estimatedBytesNeeded(item)
                     val isLow = needed > 0 && t.freeBytes in 1 until needed
                     val freeText = if (isLow) {
                         stringResource(R.string.stores_storage_low, formatBytes(t.freeBytes), formatBytes(needed))
diff --git a/app/src/main/java/com/droiddeck/launcher/ui/StoresPage.kt b/app/src/main/java/com/droiddeck/launcher/ui/StoresPage.kt
index 2494514e4..3f005ec7b 100644
--- a/app/src/main/java/com/droiddeck/launcher/ui/StoresPage.kt
+++ b/app/src/main/java/com/droiddeck/launcher/ui/StoresPage.kt
@@ -511,7 +511,7 @@ private fun InstallWhere(item: CatalogItem) {
             StepTitle(title)
             StepList {
                 targets.forEachIndexed { i, t ->
-                    val needed = com.droiddeck.launcher.stores.StoreInstallRoot.estimatedBytesNeeded(item, t.root, !t.removable)
+                    val needed = com.droiddeck.launcher.stores.StoreInstallRoot.estimatedBytesNeeded(item)
                     val isLow = needed > 0 && t.freeBytes in 1 until needed
                     val trailingText = if (isLow) {
                         stringResource(R.string.stores_storage_low, formatBytes(t.freeBytes), formatBytes(needed))
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index dd47a9882..309d6e000 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -2258,7 +2258,6 @@
     <string name="stores_target_internal">Internal</string>
     <string name="stores_target_free">%1$s free</string>
     <string name="stores_storage_insufficient">Not enough free space: need %1$s, only %2$s free</string>
-    <string name="stores_storage_internal_cache_insufficient">Not enough internal space for download cache: need %1$s, only %2$s free</string>
     <string name="stores_storage_low">Insufficient space (%1$s free, need %2$s)</string>
     <string name="stores_notification_channel">Store downloads</string>
     <string name="stores_notification_channel_hint">Shows game download progress and keeps downloads running in the background</string>
diff --git a/app/src/test/java/com/droiddeck/launcher/stores/StoreInstallRootTest.kt b/app/src/test/java/com/droiddeck/launcher/stores/StoreInstallRootTest.kt
index ae1353e79..10d8b0ea4 100644
--- a/app/src/test/java/com/droiddeck/launcher/stores/StoreInstallRootTest.kt
+++ b/app/src/test/java/com/droiddeck/launcher/stores/StoreInstallRootTest.kt
@@ -60,16 +60,12 @@ class StoreInstallRootTest {
         assertEquals("a_b_c", dir.name)
     }
 
-    @Test fun estimatedBytesNeededCountsDoubleForEpicInternalStorage() {
+    @Test fun estimatedBytesNeededUsesKnownInstallSizeForAllStores() {
         val item = CatalogItem(Store.EPIC, "game1", "Game 1", imageUrl = null, owned = true, sizeBytes = 10_000_000L)
-        val internalDir = StoreInstallRoot.internalRoot(app)
-        val cardDir = File(app.filesDir, "card/Games")
-
-        assertEquals(20_000_000L, StoreInstallRoot.estimatedBytesNeeded(item, internalDir, isInternal = true))
-        assertEquals(10_000_000L, StoreInstallRoot.estimatedBytesNeeded(item, cardDir, isInternal = false))
+        assertEquals(10_000_000L, StoreInstallRoot.estimatedBytesNeeded(item))
 
         val gogItem = CatalogItem(Store.GOG, "game2", "Game 2", imageUrl = null, owned = true, sizeBytes = 10_000_000L)
-        assertEquals(10_000_000L, StoreInstallRoot.estimatedBytesNeeded(gogItem, internalDir, isInternal = true))
+        assertEquals(10_000_000L, StoreInstallRoot.estimatedBytesNeeded(gogItem))
     }
 
     @Test fun checkStorageReportsEnoughWhenSpaceIsUnknownOrAvailable() {