diff --git a/src/components/Export/components/DownloadCurlCommand/downloadCurlCommand.tsx b/src/components/Export/components/DownloadCurlCommand/downloadCurlCommand.tsx
index e8ec6d5d..a5289998 100644
--- a/src/components/Export/components/DownloadCurlCommand/downloadCurlCommand.tsx
+++ b/src/components/Export/components/DownloadCurlCommand/downloadCurlCommand.tsx
@@ -4,6 +4,7 @@ import { Filters } from "../../../../common/entities";
 import { useExploreState } from "../../../../hooks/useExploreState";
 import { FileManifestType } from "../../../../hooks/useFileManifest/common/entities";
 import { useFileManifest } from "../../../../hooks/useFileManifest/useFileManifest";
+import { useFileManifestFileCount } from "../../../../hooks/useFileManifest/useFileManifestFileCount";
 import {
   FileLocation,
   useRequestFileLocation,
@@ -30,6 +31,7 @@ interface DownloadCurlCommandProps {
   filters: Filters; // Initializes bulk download filters.
   formFacet: FormFacet;
   manifestDownloadFormat?: ManifestDownloadFormat;
+  speciesFacetName: string;
 }
 
 export const DownloadCurlCommand = ({
@@ -41,8 +43,10 @@ export const DownloadCurlCommand = ({
   filters,
   formFacet,
   manifestDownloadFormat = MANIFEST_DOWNLOAD_FORMAT.CURL,
+  speciesFacetName,
 }: DownloadCurlCommandProps): JSX.Element => {
   useFileManifest(filters, fileSummaryFacetName);
+  useFileManifestFileCount(filters, speciesFacetName, fileSummaryFacetName);
   const [executionEnvironment, setExecutionEnvironment] =
     useState<ExecutionEnvironment>(BULK_DOWNLOAD_EXECUTION_ENVIRONMENT.BASH);
   const {
diff --git a/src/components/Export/components/ExportToTerra/exportToTerra.tsx b/src/components/Export/components/ExportToTerra/exportToTerra.tsx
index 96b670fb..bec99a85 100644
--- a/src/components/Export/components/ExportToTerra/exportToTerra.tsx
+++ b/src/components/Export/components/ExportToTerra/exportToTerra.tsx
@@ -4,6 +4,7 @@ import { useExploreState } from "../../../../hooks/useExploreState";
 import { useExportToTerraResponseURL } from "../../../../hooks/useExportToTerraResponseURL";
 import { FileManifestType } from "../../../../hooks/useFileManifest/common/entities";
 import { useFileManifest } from "../../../../hooks/useFileManifest/useFileManifest";
+import { useFileManifestFileCount } from "../../../../hooks/useFileManifest/useFileManifestFileCount";
 import { useFileManifestFormat } from "../../../../hooks/useFileManifest/useFileManifestFormat";
 import { useRequestFileLocation } from "../../../../hooks/useRequestFileLocation";
 import { useRequestManifest } from "../../../../hooks/useRequestManifest/useRequestManifest";
@@ -24,6 +25,7 @@ export interface ExportToTerraProps {
   formFacet: FormFacet;
   manifestDownloadFormat?: ManifestDownloadFormat;
   manifestDownloadFormats: ManifestDownloadFormat[];
+  speciesFacetName: string;
 }
 
 export const ExportToTerra = ({
@@ -36,11 +38,13 @@ export const ExportToTerra = ({
   formFacet,
   manifestDownloadFormat,
   manifestDownloadFormats,
+  speciesFacetName,
 }: ExportToTerraProps): JSX.Element => {
   const {
     exploreState: { tabValue: entityList },
   } = useExploreState();
   useFileManifest(filters, fileSummaryFacetName);
+  useFileManifestFileCount(filters, speciesFacetName, fileSummaryFacetName);
   const fileManifestFormatState = useFileManifestFormat(manifestDownloadFormat);
   const { requestMethod, requestParams, requestUrl } = useRequestManifest(
     fileManifestFormatState.fileManifestFormat,
diff --git a/src/components/Export/components/ManifestDownload/manifestDownload.tsx b/src/components/Export/components/ManifestDownload/manifestDownload.tsx
index 08550ef1..de218f28 100644
--- a/src/components/Export/components/ManifestDownload/manifestDownload.tsx
+++ b/src/components/Export/components/ManifestDownload/manifestDownload.tsx
@@ -4,6 +4,7 @@ import { Filters } from "../../../../common/entities";
 import { useExploreState } from "../../../../hooks/useExploreState";
 import { FileManifestType } from "../../../../hooks/useFileManifest/common/entities";
 import { useFileManifest } from "../../../../hooks/useFileManifest/useFileManifest";
+import { useFileManifestFileCount } from "../../../../hooks/useFileManifest/useFileManifestFileCount";
 import {
   FileLocation,
   useRequestFileLocation,
@@ -25,6 +26,7 @@ export interface ManifestDownloadProps {
   manifestDownloadFormat?: ManifestDownloadFormat;
   ManifestDownloadStart: ElementType;
   ManifestDownloadSuccess: ElementType;
+  speciesFacetName: string;
 }
 
 export const ManifestDownload = ({
@@ -36,8 +38,10 @@ export const ManifestDownload = ({
   manifestDownloadFormat = MANIFEST_DOWNLOAD_FORMAT.COMPACT,
   ManifestDownloadStart,
   ManifestDownloadSuccess,
+  speciesFacetName,
 }: ManifestDownloadProps): JSX.Element => {
   useFileManifest(filters, fileSummaryFacetName);
+  useFileManifestFileCount(filters, speciesFacetName, fileSummaryFacetName);
   const {
     exploreState: { tabValue: entityList },
   } = useExploreState();
diff --git a/src/hooks/useFileManifest/useFileManifestFileCount.ts b/src/hooks/useFileManifest/useFileManifestFileCount.ts
new file mode 100644
index 00000000..d1a7b345
--- /dev/null
+++ b/src/hooks/useFileManifest/useFileManifestFileCount.ts
@@ -0,0 +1,65 @@
+import { useEffect, useState } from "react";
+import { Filters } from "../../common/entities";
+import { FileManifestActionKind } from "../../providers/fileManifestState";
+import { useCatalog } from "../useCatalog";
+import { useFileManifestState } from "../useFileManifestState";
+import { useFetchSummary } from "./useFetchSummary";
+
+/**
+ * Fetches the latest file count from the summary endpoint, excluding filters
+ * that match the provided species and file facet names, and updates the file manifest state.
+ *
+ * @param initialFilters - The initial set of filters to apply.
+ * @param speciesFacetName - The facet name representing species to exclude from the summary request.
+ * @param fileFacetName - The facet name representing file type to exclude from the summary request.
+ */
+export const useFileManifestFileCount = (
+  initialFilters: Filters | undefined,
+  speciesFacetName: string,
+  fileFacetName: string
+): void => {
+  // Initial file manifest filter.
+  const [initFilters] = useState(() => initialFilters);
+
+  // File manifest dispatch.
+  const { fileManifestDispatch } = useFileManifestState();
+
+  // Determine catalog.
+  const catalog = useCatalog() as string; // catalog should be defined.
+
+  // Get filters required for fetching the summary.
+  const filters = excludeFacetsFromFilters(initFilters, [
+    speciesFacetName,
+    fileFacetName,
+  ]);
+
+  // Fetch file count from summary.
+  const { summary: { fileCount } = {} } = useFetchSummary(
+    filters,
+    catalog,
+    true
+  );
+
+  useEffect(() => {
+    fileManifestDispatch({
+      payload: { fileCount },
+      type: FileManifestActionKind.UpdateFileCount,
+    });
+  }, [fileCount, fileManifestDispatch]);
+};
+
+/**
+ * Returns a new filters array with the specified facet names excluded.
+ *
+ * @param filters - The list of filters to process.
+ * @param facetNames - The facet names to exclude from the filters.
+ * @returns The filters array excluding any filters matching the provided facet names.
+ */
+function excludeFacetsFromFilters(
+  filters: Filters | undefined,
+  facetNames: string[]
+): Filters {
+  return (filters || []).filter(
+    ({ categoryKey }) => !facetNames.includes(categoryKey)
+  );
+}
diff --git a/src/hooks/useRequestManifest/utils.ts b/src/hooks/useRequestManifest/utils.ts
index ee9af3e5..a07fbc59 100644
--- a/src/hooks/useRequestManifest/utils.ts
+++ b/src/hooks/useRequestManifest/utils.ts
@@ -12,36 +12,41 @@ import { REQUEST_MANIFEST } from "./constants";
 import { UseRequestManifest } from "./types";
 
 /**
- * Returns true if all form facets have all their terms selected.
- * @param formFacet - Form related file facets.
- * @returns true if all form facets have all their terms selected.
+ * Determines whether all files are selected by comparing the file count to the summary file count.
+ *
+ * @param state - The file manifest state object.
+ * @returns True if all files are selected; otherwise, false.
  */
-export function areAllFormFilterTermsSelected(formFacet: FormFacet): boolean {
-  return Object.values(formFacet)
-    .filter(Boolean)
-    .every(
-      ({ selectedTermCount, termCount }: FileFacet) =>
-        selectedTermCount === termCount
-    );
+export function areAllFilesSelected(state: FileManifestState): boolean {
+  const { fileCount, summary } = state;
+
+  // Return false if file count or summary file count is undefined.
+  if (fileCount === undefined || summary?.fileCount === undefined) return false;
+
+  // Return true if file count equals summary file count.
+  return fileCount === summary.fileCount;
 }
 
 /**
- * Generates the filters for a request URL based on the file manifest state.
- * - **all form facets have all their terms selected** - returns filters from state without form filters.
- * - **at least one form facet has an unselected term** - returns filters from state.
- * @param state - File manifest state.
- * @param formFacet - Form related file facets.
- * @returns filters for the request URL.
+ * Builds the filters object for a request URL based on the file manifest state and form facets.
+ *
+ * - If all files are selected, returns filters from state excluding fully selected form filters.
+ * - If only some files are selected, returns the current filters from state.
+ *
+ * @param state - The file manifest state object.
+ * @param formFacet - The form-related file facets.
+ * @returns The filters to use for the request URL.
  */
 export function buildRequestFilters(
   state: FileManifestState,
   formFacet: FormFacet
 ): Filters {
-  // Form terms are fully selected; return filters excluding form filters.
-  if (areAllFormFilterTermsSelected(formFacet)) {
+  // Return filters from state excluding form filters if all files are selected.
+  if (areAllFilesSelected(state)) {
     return excludeFullySelectedFormFilters(state, formFacet);
   }
-  // Form terms are partially selected; return filters.
+
+  // Return current filters from state.
   return state.filters;
 }
 
@@ -115,16 +120,24 @@ export function isCatalogReady(catalog: string | undefined): boolean {
 }
 
 /**
- * Returns true if the file manifest state is ready for a request.
- * A file manifest state is considered ready if it is both enabled (`isEnabled` is `true`)
- * and not currently loading (`isLoading` is `false`).
+ * Determines if the file manifest state is ready to be used in a request.
+ *
+ * The state is considered ready when:
+ * - isEnabled is true
+ * - fileCount is defined
+ * - isLoading is false
+ *
  * @param fileManifestState - File manifest state.
- * @returns true if the file manifest state is ready for a request.
+ * @returns true if the file manifest state is ready.
  */
 export function isFileManifestStateReady(
   fileManifestState: FileManifestState
 ): boolean {
-  return fileManifestState.isEnabled && !fileManifestState.isLoading;
+  return (
+    fileManifestState.isEnabled &&
+    fileManifestState.fileCount !== undefined &&
+    !fileManifestState.isLoading
+  );
 }
 
 /**
diff --git a/src/mocks/useRequestFileManifest.mocks.ts b/src/mocks/useRequestFileManifest.mocks.ts
index 40d796ce..340b1041 100644
--- a/src/mocks/useRequestFileManifest.mocks.ts
+++ b/src/mocks/useRequestFileManifest.mocks.ts
@@ -79,9 +79,11 @@ export const FILTERS: Record<string, Filters> = {
 };
 
 export const FILE_MANIFEST_STATE = {
+  fileCount: 10,
   filters: FILTERS.FORM_INITIAL_SET,
   isEnabled: true,
   isLoading: false,
+  summary: { fileCount: 10 },
 } as FileManifestState;
 
 export const FORM_FACET: Record<string, FormFacet> = {
diff --git a/src/providers/fileManifestState.tsx b/src/providers/fileManifestState.tsx
index 6fb6fbc8..b255b9f5 100644
--- a/src/providers/fileManifestState.tsx
+++ b/src/providers/fileManifestState.tsx
@@ -24,6 +24,7 @@ import { FILE_MANIFEST_STATE } from "./fileManifestState/constants";
  * File manifest state.
  */
 export type FileManifestState = {
+  fileCount: number | undefined;
   filesFacets: FileFacet[];
   fileSummary?: AzulSummaryResponse;
   fileSummaryFacetName?: string;
@@ -133,6 +134,7 @@ export function FileManifestStateProvider({
 export enum FileManifestActionKind {
   ClearFileManifest = "CLEAR_FILE_MANIFEST",
   FetchFileManifest = "FETCH_FILE_MANIFEST",
+  UpdateFileCount = "UPDATE_FILE_COUNT",
   UpdateFileManifest = "UPDATE_FILE_MANIFEST",
   UpdateFilter = "UPDATE_FILTER",
   UpdateFiltersCategory = "UPDATE_FILTERS_CATEGORY",
@@ -144,6 +146,7 @@ export enum FileManifestActionKind {
 export type FileManifestAction =
   | ClearFileManifestAction
   | FetchFileManifestAction
+  | UpdateFileCountAction
   | UpdateFileManifestAction
   | UpdateFilterAction
   | UpdateFiltersCategoryAction;
@@ -172,6 +175,14 @@ type UpdateFileManifestAction = {
   type: FileManifestActionKind.UpdateFileManifest;
 };
 
+/**
+ * Update file count action.
+ */
+type UpdateFileCountAction = {
+  payload: UpdateFileCountPayload;
+  type: FileManifestActionKind.UpdateFileCount;
+};
+
 /**
  * Update filter action.
  */
@@ -196,6 +207,13 @@ type FetchFileManifestPayload = {
   filters: Filters;
 };
 
+/**
+ * Update file count payload.
+ */
+export type UpdateFileCountPayload = {
+  fileCount: number | undefined;
+};
+
 /**
  * Update file manifest payload.
  */
@@ -235,6 +253,7 @@ function fileManifestReducer(
     case FileManifestActionKind.ClearFileManifest: {
       return {
         ...state,
+        fileCount: undefined,
         isEnabled: false,
       };
     }
@@ -252,6 +271,10 @@ function fileManifestReducer(
         isEnabled: true,
       };
     }
+    // Updates file count.
+    case FileManifestActionKind.UpdateFileCount: {
+      return { ...state, ...payload };
+    }
     // Updates file manifest.
     case FileManifestActionKind.UpdateFileManifest: {
       return { ...state, ...payload };
diff --git a/src/providers/fileManifestState/constants.ts b/src/providers/fileManifestState/constants.ts
index d23c2afb..f1ef724a 100644
--- a/src/providers/fileManifestState/constants.ts
+++ b/src/providers/fileManifestState/constants.ts
@@ -1,6 +1,7 @@
 import { FileManifestState } from "../fileManifestState";
 
 export const FILE_MANIFEST_STATE: FileManifestState = {
+  fileCount: undefined,
   fileSummary: undefined,
   fileSummaryFacetName: undefined,
   fileSummaryFilters: [],
diff --git a/tests/buildRequestFilters.test.ts b/tests/buildRequestFilters.test.ts
index 04c6dabe..2d4f0b69 100644
--- a/tests/buildRequestFilters.test.ts
+++ b/tests/buildRequestFilters.test.ts
@@ -24,26 +24,18 @@ describe("buildRequestFilters", () => {
       expect(result).toEqual(fileManifestState.filters);
     });
 
-    test("when at least one form facet has no terms selected", () => {
-      const fileManifestState = getFileManifestState(
-        FILTERS.FORM_INCOMPLETE_SET
-      );
+    test("when summary file count is not equal to initial file count", () => {
+      const fileManifestState = getFileManifestState(FILTERS.FORM_COMPLETE_SET);
       const result = buildRequestFilters(
-        fileManifestState,
-        FORM_FACET.INCOMPLETE_SET
+        { ...fileManifestState, summary: { fileCount: 9 } },
+        FORM_FACET.COMPLETE_SET
       );
       expect(result).toEqual(fileManifestState.filters);
     });
-
-    test("when at least one form facet has an unselected term", () => {
-      const fileManifestState = getFileManifestState(FILTERS.FORM_SUBSET);
-      const result = buildRequestFilters(fileManifestState, FORM_FACET.SUBSET);
-      expect(result).toEqual(fileManifestState.filters);
-    });
   });
 
   describe("should return filters excluding form related filters", () => {
-    test("when all form facets have all their terms selected", () => {
+    test("when summary file count is equal to initial file count", () => {
       const fileManifestState = getFileManifestState(FILTERS.FORM_COMPLETE_SET);
       const result = buildRequestFilters(
         fileManifestState,
diff --git a/tests/useRequestManifest.test.ts b/tests/useRequestManifest.test.ts
index ff6897d1..dfa86fc9 100644
--- a/tests/useRequestManifest.test.ts
+++ b/tests/useRequestManifest.test.ts
@@ -109,6 +109,16 @@ describe("useRequestManifest", () => {
       });
     });
 
+    test("when fileManifestState fileCount is undefined", () => {
+      MOCK_USE_FILE_MANIFEST_STATE.mockReturnValue({
+        fileManifestDispatch: jest.fn(),
+        fileManifestState: { ...FILE_MANIFEST_STATE, fileCount: undefined },
+      });
+      testRequestManifest({
+        fileManifestFormat: MANIFEST_DOWNLOAD_FORMAT.VERBATIM_PFB,
+      });
+    });
+
     describe("form selection is not ready", () => {
       test("when a form facet is undefined", () => {
         testRequestManifest({