2 files changed, 9 insertions, 0 deletions

diff --git a/firmware/drivers/fat.c b/firmware/drivers/fat.c
index ad1a7a0c82..38223edc6a 100644
--- a/firmware/drivers/fat.c
+++ b/firmware/drivers/fat.c
@@ -223,6 +223,14 @@ int fat_startsector(void)
     return fat_bpb.startsector;
 }
 
+void fat_size(unsigned int* size, unsigned int* free)
+{
+    if (size)
+        *size = fat_bpb.dataclusters * fat_bpb.bpb_secperclus / 2;
+    if (free)
+        *free = fat_bpb.fsinfo.freecount * fat_bpb.bpb_secperclus / 2;
+}
+
 int fat_mount(int startsector)
 {
     unsigned char buf[SECTOR_SIZE];
diff --git a/firmware/drivers/fat.h b/firmware/drivers/fat.h
index b23d8dfa08..8ef2982279 100644
--- a/firmware/drivers/fat.h
+++ b/firmware/drivers/fat.h
@@ -67,6 +67,7 @@ struct fat_dir
 
 
 extern int fat_mount(int startsector);
+extern void fat_size(unsigned int* size, unsigned int* free);
 
 extern int fat_create_dir(unsigned int currdir, char *name);
 extern int fat_startsector(void);