diff --git a/Source/Core/Core/IOS/FS/FileSystem.h b/Source/Core/Core/IOS/FS/FileSystem.h
index 581df6fbee..f02d2eb350 100644
--- a/Source/Core/Core/IOS/FS/FileSystem.h
+++ b/Source/Core/Core/IOS/FS/FileSystem.h
@@ -107,6 +107,33 @@ struct Metadata
   u16 fst_index;
 };
 
+// size of a single cluster in the NAND in bytes
+constexpr u16 CLUSTER_SIZE = 16384;
+
+// total number of clusters available in the NAND
+constexpr u16 TOTAL_CLUSTERS = 0x7ec0;
+
+// number of clusters reserved for bad blocks and similar, not accessible to normal writes
+constexpr u16 RESERVED_CLUSTERS = 0x0300;
+
+// number of clusters actually usable by the file system
+constexpr u16 USABLE_CLUSTERS = TOTAL_CLUSTERS - RESERVED_CLUSTERS;
+
+// size of a single 'block' as defined by the Wii System Menu in clusters
+constexpr u16 CLUSTERS_PER_BLOCK = 8;
+
+// total number of user-accessible blocks in the NAND
+constexpr u16 USER_BLOCKS = 2176;
+
+// total number of user-accessible clusters in the NAND
+constexpr u16 USER_CLUSTERS = USER_BLOCKS * CLUSTERS_PER_BLOCK;
+
+// the inverse of that, the amount of usable clusters reserved for system files
+constexpr u16 SYSTEM_CLUSTERS = USABLE_CLUSTERS - USER_CLUSTERS;
+
+// total number of inodes available in the NAND
+constexpr u16 TOTAL_INODES = 0x17ff;
+
 struct NandStats
 {
   u32 cluster_size;
diff --git a/Source/Core/Core/IOS/FS/HostBackend/FS.cpp b/Source/Core/Core/IOS/FS/HostBackend/FS.cpp
index f09cadb7c8..8c832b2934 100644
--- a/Source/Core/Core/IOS/FS/HostBackend/FS.cpp
+++ b/Source/Core/Core/IOS/FS/HostBackend/FS.cpp
@@ -29,21 +29,6 @@ namespace IOS::HLE::FS
 {
 constexpr u32 BUFFER_CHUNK_SIZE = 65536;
 
-// size of a single cluster in the NAND
-constexpr u16 CLUSTER_SIZE = 16384;
-
-// total number of clusters available in the NAND
-constexpr u16 TOTAL_CLUSTERS = 0x7ec0;
-
-// number of clusters reserved for bad blocks and similar, not accessible to normal writes
-constexpr u16 RESERVED_CLUSTERS = 0x0300;
-
-// number of clusters actually usable by the file system
-constexpr u16 USABLE_CLUSTERS = TOTAL_CLUSTERS - RESERVED_CLUSTERS;
-
-// total number of inodes available in the NAND
-constexpr u16 TOTAL_INODES = 0x17ff;
-
 HostFileSystem::HostFilename HostFileSystem::BuildFilename(const std::string& wii_path) const
 {
   for (const auto& redirect : m_nand_redirects)