diff --git a/arm9/source/driveMenu.cpp b/arm9/source/driveMenu.cpp
index 5293fcf..b7383be 100644
--- a/arm9/source/driveMenu.cpp
+++ b/arm9/source/driveMenu.cpp
@@ -160,12 +160,12 @@ void dm_drawBottomScreen(void) {
 		case DriveMenuOperation::sdCard:
 			font->printf(0, 0, false, Alignment::left, Palette::white, STR_SDCARD_LABEL.c_str(), sdLabel[0] == 0 ? STR_UNTITLED.c_str() : sdLabel);
 			font->printf(0, 1, false, Alignment::left, Palette::white, STR_SD_FAT.c_str(), getBytes(sdSize).c_str());
-			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(getBytesFree("sd:/")).c_str());
+			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(driveSizeFree(Drive::sdCard)).c_str());
 			break;
 		case DriveMenuOperation::flashcard:
 			font->printf(0, 0, false, Alignment::left, Palette::white, STR_FLASHCARD_LABEL.c_str(), fatLabel[0] == 0 ? STR_UNTITLED.c_str() : fatLabel);
 			font->printf(0, 1, false, Alignment::left, Palette::white, STR_SLOT1_FAT.c_str(), getBytes(fatSize).c_str());
-			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(getBytesFree("fat:/")).c_str());
+			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(driveSizeFree(Drive::flashcard)).c_str());
 			break;
 		case DriveMenuOperation::gbaCart:
 			font->printf(0, 0, false, Alignment::left, Palette::white, STR_GBA_GAMECART.c_str(), romTitle[1]);
@@ -186,16 +186,17 @@ void dm_drawBottomScreen(void) {
 		case DriveMenuOperation::ramDrive:
 			font->print(0, 0, false, STR_RAMDRIVE_LABEL);
 			font->printf(0, 1, false, Alignment::left, Palette::white, STR_RAMDRIVE_FAT.c_str(), getBytes(ramdSize).c_str());
-			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(getBytesFree("ram:/")).c_str());
+			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(driveSizeFree(Drive::ramDrive)).c_str());
 			break;
 		case DriveMenuOperation::sysNand:
 			font->print(0, 0, false, STR_SYSNAND_LABEL);
 			font->printf(0, 1, false, Alignment::left, Palette::white, STR_SYSNAND_FAT.c_str(), getBytes(nandSize).c_str());
-			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(getBytesFree("nand:/")).c_str());
+			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(driveSizeFree(Drive::nand)).c_str());
 			break;
 		case DriveMenuOperation::fatImage:
 			font->printf(0, 0, false, Alignment::left, Palette::white, STR_FAT_LABEL.c_str(), imgLabel[0] == 0 ? STR_UNTITLED.c_str() : imgLabel);
 			font->printf(0, 1, false, Alignment::left, Palette::white, STR_FAT_IMAGE.c_str(), getBytes(imgSize).c_str());
+			font->printf(0, 2, false, Alignment::left, Palette::white, STR_N_FREE.c_str(), getBytes(driveSizeFree(Drive::fatImg)).c_str());
 			break;
 		case DriveMenuOperation::none:
 			break;
diff --git a/arm9/source/driveOperations.cpp b/arm9/source/driveOperations.cpp
index 59db8d5..10e1cfd 100644
--- a/arm9/source/driveOperations.cpp
+++ b/arm9/source/driveOperations.cpp
@@ -443,3 +443,22 @@ bool driveRemoved(Drive drive) {
 
 	return false;
 }
+
+u64 driveSizeFree(Drive drive) {
+	switch(drive) {
+		case Drive::sdCard:
+			return getBytesFree("sd:/");
+		case Drive::flashcard:
+			return getBytesFree("fat:/");
+		case Drive::ramDrive:
+			return getBytesFree("ram:/");
+		case Drive::nand:
+			return getBytesFree("nand:/");
+		case Drive::nitroFS:
+			return 0;
+		case Drive::fatImg:
+			return getBytesFree("img:/");
+	}
+
+	return 0;
+}
diff --git a/arm9/source/driveOperations.h b/arm9/source/driveOperations.h
index 6873ac5..b91a176 100644
--- a/arm9/source/driveOperations.h
+++ b/arm9/source/driveOperations.h
@@ -56,5 +56,6 @@ extern void imgUnmount(void);
 extern u64 getBytesFree(const char* drivePath);
 extern bool driveWritable(Drive drive);
 extern bool driveRemoved(Drive drive);
+extern u64 driveSizeFree(Drive drive);
 
 #endif //FLASHCARD_H
diff --git a/arm9/source/fileOperations.cpp b/arm9/source/fileOperations.cpp
index c1984e5..06a42fe 100644
--- a/arm9/source/fileOperations.cpp
+++ b/arm9/source/fileOperations.cpp
@@ -180,17 +180,56 @@ void dirCopy(const DirEntry &entry, int i, const char *destinationPath, const ch
 	if (((int)dirContents.size()) != 1)	fcopy((sourcePath + ("/" + entry.name)).c_str(), (destinationPath + ("/" + entry.name)).c_str());
 }
 
-int fcopy(const char *sourcePath, const char *destinationPath) {
+u64 dirSize(const std::vector<DirEntry> &dirContents) {
+	u64 size = 0;
+
+	for(const DirEntry &entry : dirContents) {
+		if(entry.name == "." || entry.name == "..")
+			continue;
+
+		if(entry.isDirectory) {
+			std::vector<DirEntry> subdirContents;
+			if(chdir(entry.name.c_str()) == 0 && getDirectoryContents(subdirContents)) {
+				size += dirSize(subdirContents);
+				chdir("..");
+			}
+		} else {
+			size += getFileSize(entry.name.c_str());
+		}
+	}
+
+	return size;
+}
+
+bool fcopy(const char *sourcePath, const char *destinationPath) {
 	DIR *isDir = opendir(sourcePath);
 	
 	if (isDir != NULL) {
 		closedir(isDir);
 
 		// Source path is a directory
+		char startPath[PATH_MAX];
+		getcwd(startPath, PATH_MAX);
+
 		chdir(sourcePath);
 		std::vector<DirEntry> dirContents;
 		getDirectoryContents(dirContents);
 
+		// Check that everything will fit
+		if(dirSize(dirContents) > driveSizeFree(currentDrive)) {
+			font->clear(false);
+			font->printf(0, 0, false, Alignment::left, Palette::white, (STR_FILE_TOO_BIG + "\n\n" + STR_A_OK).c_str(), sourcePath);
+			font->update(false);
+
+			do {
+				swiWaitForVBlank();
+				scanKeys();
+			} while(!(keysDown() & KEY_A));
+
+			chdir(startPath);
+			return false;
+		}
+
 		mkdir(destinationPath, 0777);
 		for (int i = 1; i < ((int)dirContents.size()); i++) {
 			chdir(sourcePath);
@@ -199,25 +238,39 @@ int fcopy(const char *sourcePath, const char *destinationPath) {
 
 		chdir(destinationPath);
 		chdir("..");
-		return 1;
+		return true;
 	} else {
 		closedir(isDir);
 
 		// Source path is a file
 		FILE* sourceFile = fopen(sourcePath, "rb");
-		off_t fsize = 0;
+		long fsize = 0;
 		if (sourceFile) {
 			fseek(sourceFile, 0, SEEK_END);
 			fsize = ftell(sourceFile); // Get source file's size
 			fseek(sourceFile, 0, SEEK_SET);
 		} else {
-			return -1;
+			return false;
+		}
+
+		// Check that the file will fit
+		if((u64)fsize > driveSizeFree(currentDrive)) {
+			font->clear(false);
+			font->printf(0, 0, false, Alignment::left, Palette::white, (STR_FILE_TOO_BIG + "\n\n" + STR_A_OK).c_str(), sourcePath);
+			font->update(false);
+
+			do {
+				swiWaitForVBlank();
+				scanKeys();
+			} while(!(keysDown() & KEY_A));
+
+			return false;
 		}
 
 		FILE* destinationFile = fopen(destinationPath, "wb");
 		if (!destinationFile) {
 			fclose(sourceFile);
-			return -1;
+			return false;
 		}
 
 		font->clear(false);
@@ -233,8 +286,7 @@ int fcopy(const char *sourcePath, const char *destinationPath) {
 				// Cancel copying
 				fclose(sourceFile);
 				fclose(destinationFile);
-				return -1;
-				break;
+				return false;
 			}
 
 			font->print((offset / (fsize / (SCREEN_COLS - 2))) + 1, 1, false, "=");
@@ -246,7 +298,7 @@ int fcopy(const char *sourcePath, const char *destinationPath) {
 			if(fwrite(copyBuf, 1, numr, destinationFile) != numr) {
 				fclose(sourceFile);
 				fclose(destinationFile);
-				return -1;
+				return false;
 			}
 			offset += copyBufSize;
 
@@ -254,12 +306,12 @@ int fcopy(const char *sourcePath, const char *destinationPath) {
 				fclose(sourceFile);
 				fclose(destinationFile);
 
-				return 1;
+				return true;
 				break;
 			}
 		}
 
-		return -1;
+		return false;
 	}
 }
 
diff --git a/arm9/source/fileOperations.h b/arm9/source/fileOperations.h
index 7a19fb8..e474f77 100644
--- a/arm9/source/fileOperations.h
+++ b/arm9/source/fileOperations.h
@@ -24,7 +24,7 @@ extern std::string getBytes(off_t bytes);
 extern off_t getFileSize(const char *fileName);
 extern bool calculateSHA1(const char *fileName, u8 *sha1);
 extern int trimNds(const char *fileName);
-extern int fcopy(const char *sourcePath, const char *destinationPath);
+extern bool fcopy(const char *sourcePath, const char *destinationPath);
 void changeFileAttribs(const DirEntry *entry);
 
 #endif // FILE_COPY
diff --git a/arm9/source/file_browse.cpp b/arm9/source/file_browse.cpp
index 8e8033c..ac36234 100644
--- a/arm9/source/file_browse.cpp
+++ b/arm9/source/file_browse.cpp
@@ -76,7 +76,7 @@ bool dirEntryPredicate (const DirEntry& lhs, const DirEntry& rhs) {
 	return strcasecmp(lhs.name.c_str(), rhs.name.c_str()) < 0;
 }
 
-void getDirectoryContents(std::vector<DirEntry>& dirContents) {
+bool getDirectoryContents(std::vector<DirEntry>& dirContents) {
 	dirContents.clear();
 
 	DIR *pdir = opendir (".");
@@ -84,6 +84,7 @@ void getDirectoryContents(std::vector<DirEntry>& dirContents) {
 	if (pdir == nullptr) {
 		font->print(0, 0, true, STR_UNABLE_TO_OPEN_DIRECTORY);
 		font->update(true);
+		return false;
 	} else {
 		while (true) {
 			dirent *pent = readdir(pdir);
@@ -109,6 +110,8 @@ void getDirectoryContents(std::vector<DirEntry>& dirContents) {
 
 	// Add ".." to top of list
 	dirContents.insert(dirContents.begin(), {"..", 0, true, false});
+
+	return true;
 }
 
 void showDirectoryContents(std::vector<DirEntry> &dirContents, int fileOffset, int startRow) {
@@ -559,18 +562,18 @@ bool fileBrowse_paste(char dest[256]) {
 }
 
 void recRemove(const char *path, std::vector<DirEntry> dirContents) {
-	chdir (path);
-	getDirectoryContents(dirContents);
-	for (int i = 1; i < ((int)dirContents.size()); i++) {
-		DirEntry &entry = dirContents[i];
-		if (entry.isDirectory)
-			recRemove(entry.name.c_str(), dirContents);
-		if (!(FAT_getAttr(entry.name.c_str()) & ATTR_READONLY)) {
-			remove(entry.name.c_str());
+	if(chdir(path) == 0 && getDirectoryContents(dirContents)) {
+		for (int i = 1; i < ((int)dirContents.size()); i++) {
+			DirEntry &entry = dirContents[i];
+			if (entry.isDirectory)
+				recRemove(entry.name.c_str(), dirContents);
+			if (!(FAT_getAttr(entry.name.c_str()) & ATTR_READONLY)) {
+				remove(entry.name.c_str());
+			}
 		}
+		chdir("..");
+		remove(path);
 	}
-	chdir ("..");
-	remove(path);
 }
 
 void fileBrowse_drawBottomScreen(DirEntry* entry) {
diff --git a/arm9/source/file_browse.h b/arm9/source/file_browse.h
index 68e95ad..1f03cb2 100644
--- a/arm9/source/file_browse.h
+++ b/arm9/source/file_browse.h
@@ -57,7 +57,7 @@ enum class FileOperation {
 bool extension(const std::string_view filename, const std::vector<std::string_view> &extensions);
 
 std::string browseForFile (void);
-void getDirectoryContents (std::vector<DirEntry>& dirContents);
+bool getDirectoryContents (std::vector<DirEntry>& dirContents);
 
 
 
diff --git a/arm9/source/language.inl b/arm9/source/language.inl
index f04a655..d580607 100644
--- a/arm9/source/language.inl
+++ b/arm9/source/language.inl
@@ -37,6 +37,7 @@ STRING(START_FAILED_ERROR_N, "Start failed. Error %d")
 STRING(HEADER_TITLE, "Header Title: %s")
 STRING(TITLE_ID, "Title ID: %s")
 STRING(TITLE_IN_LANGUAGE, "Title: (\\DV %s)")
+STRING(FILE_TOO_BIG, "%s is too large to copy to this drive. Please delete some files and try again.")
 
 // Drive labels
 STRING(SDCARD_LABEL, "[sd:] SDCARD (%s)")
diff --git a/nitrofiles/languages/en-US/language.ini b/nitrofiles/languages/en-US/language.ini
index 064ba85..0173ae9 100644
--- a/nitrofiles/languages/en-US/language.ini
+++ b/nitrofiles/languages/en-US/language.ini
@@ -37,6 +37,7 @@ START_FAILED_ERROR_N=Start failed. Error %d
 HEADER_TITLE=Header Title: %s
 TITLE_ID=Title ID: %s
 TITLE_IN_LANGUAGE=Title: (\DV %s)
+FILE_TOO_BIG=%s is too large to copy to this drive. Please delete some files and try again.
 
 SDCARD_LABEL=[sd:] SDCARD (%s)
 FLASHCARD_LABEL=[fat:] FLASHCARD (%s)