diff --git a/src/core/file_sys/bis_factory.cpp b/src/core/file_sys/bis_factory.cpp
index 8935a62c3..a412dbd9c 100644
--- a/src/core/file_sys/bis_factory.cpp
+++ b/src/core/file_sys/bis_factory.cpp
@@ -12,6 +12,10 @@
 
 namespace FileSys {
 
+constexpr u64 NAND_USER_SIZE = 0x680000000;  // 26624 MiB
+constexpr u64 NAND_SYSTEM_SIZE = 0xA0000000; // 2560 MiB
+constexpr u64 NAND_TOTAL_SIZE = 0x747C00000; // 29820 MiB
+
 BISFactory::BISFactory(VirtualDir nand_root_, VirtualDir load_root_, VirtualDir dump_root_)
     : nand_root(std::move(nand_root_)), load_root(std::move(load_root_)),
       dump_root(std::move(dump_root_)),
@@ -110,30 +114,27 @@ VirtualDir BISFactory::GetImageDirectory() const {
 
 u64 BISFactory::GetSystemNANDFreeSpace() const {
     const auto sys_dir = GetOrCreateDirectoryRelative(nand_root, "/system");
-    if (sys_dir == nullptr)
-        return 0;
+    if (sys_dir == nullptr) {
+        return GetSystemNANDTotalSpace();
+    }
 
     return GetSystemNANDTotalSpace() - sys_dir->GetSize();
 }
 
 u64 BISFactory::GetSystemNANDTotalSpace() const {
-    return static_cast<u64>(Settings::values.nand_system_size);
+    return NAND_SYSTEM_SIZE;
 }
 
 u64 BISFactory::GetUserNANDFreeSpace() const {
-    const auto usr_dir = GetOrCreateDirectoryRelative(nand_root, "/user");
-    if (usr_dir == nullptr)
-        return 0;
-
-    return GetUserNANDTotalSpace() - usr_dir->GetSize();
+    return GetUserNANDTotalSpace();
 }
 
 u64 BISFactory::GetUserNANDTotalSpace() const {
-    return static_cast<u64>(Settings::values.nand_user_size);
+    return NAND_USER_SIZE;
 }
 
 u64 BISFactory::GetFullNANDTotalSpace() const {
-    return static_cast<u64>(Settings::values.nand_total_size);
+    return NAND_TOTAL_SIZE;
 }
 
 VirtualDir BISFactory::GetBCATDirectory(u64 title_id) const {