diff --git a/app/src/main/cpp/skyline/vfs/backing.h b/app/src/main/cpp/skyline/vfs/backing.h
index 1a96fa67..d0f76b9a 100644
--- a/app/src/main/cpp/skyline/vfs/backing.h
+++ b/app/src/main/cpp/skyline/vfs/backing.h
@@ -11,12 +11,27 @@ namespace skyline::vfs {
      */
     class Backing {
       public:
+        /**
+         * @brief This describes the modes that a backing is capable of
+         */
+        union Mode {
+            struct {
+                bool read : 1; //!< The backing is readable
+                bool write : 1; //!< The backing is writable
+                bool append : 1; //!< The backing can be appended
+            };
+            u32 raw; //!< The raw value of the mode
+        };
+        static_assert(sizeof(Mode) == 0x4);
+
+        Mode mode; //!< The mode of the backing
         size_t size; //!< The size of the backing in bytes
 
         /**
+         * @param mode The mode to use for the backing
          * @param size The initial size of the backing
          */
-        Backing(size_t size = 0) : size(size) {}
+        Backing(Mode mode = {true, false, false}, size_t size = 0) : mode(mode), size(size) {}
 
         /* Delete the move constructor to prevent multiple instances of the same backing */
         Backing(const Backing &) = delete;
diff --git a/app/src/main/cpp/skyline/vfs/os_backing.cpp b/app/src/main/cpp/skyline/vfs/os_backing.cpp
index 55a74e26..6bd9e1af 100644
--- a/app/src/main/cpp/skyline/vfs/os_backing.cpp
+++ b/app/src/main/cpp/skyline/vfs/os_backing.cpp
@@ -7,7 +7,7 @@
 #include "os_backing.h"
 
 namespace skyline::vfs {
-    OsBacking::OsBacking(int fd) : fd(fd) {
+    OsBacking::OsBacking(int fd) : Backing(), fd(fd) {
         struct stat fileInfo;
 
         if (fstat(fd, &fileInfo))
@@ -17,6 +17,9 @@ namespace skyline::vfs {
     }
 
     size_t OsBacking::Read(u8 *output, size_t offset, size_t size) {
+        if (!mode.read)
+            throw exception("Attempting to read a backing that is not readable");
+
         auto ret = pread64(fd, output, size, offset);
 
         if (ret < 0)
diff --git a/app/src/main/cpp/skyline/vfs/region_backing.h b/app/src/main/cpp/skyline/vfs/region_backing.h
index 8e8c25c1..84fcfb14 100644
--- a/app/src/main/cpp/skyline/vfs/region_backing.h
+++ b/app/src/main/cpp/skyline/vfs/region_backing.h
@@ -20,9 +20,12 @@ namespace skyline::vfs {
          * @param offset The offset of the region start within the parent backing
          * @param size The size of the region in the parent backing
          */
-        RegionBacking(const std::shared_ptr<vfs::Backing> &backing, size_t offset, size_t size) : Backing(size), backing(backing), offset(offset) {};
+        RegionBacking(const std::shared_ptr<vfs::Backing> &backing, size_t offset, size_t size, Mode mode = {true, false, false}) : Backing(mode, size), backing(backing), offset(offset) {};
 
         inline size_t Read(u8 *output, size_t offset, size_t size) {
+            if (!mode.read)
+                throw exception("Attempting to read a backing that is not readable");
+
             size = std::min(offset + size, this->size) - offset;
 
             return backing->Read(output, this->offset + offset, size);